Pre-Algebra Examples

$6 {(r + t)}^{4}$ , $8 {(r + t)}^{6}$

Step 1

Simplify each term.

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Use the Binomial Theorem.

$6 (r^{4} + 4 r^{3} t + 6 r^{2} t^{2} + 4 r t^{3} + t^{4}), 8 {(r + t)}^{6}$

Apply the distributive property.

$6 r^{4} + 6 (4 r^{3} t) + 6 (6 r^{2} t^{2}) + 6 (4 r t^{3}) + 6 t^{4}, 8 {(r + t)}^{6}$

Simplify.

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Multiply $4$ by $6$ .

$6 r^{4} + 24 (r^{3} t) + 6 (6 r^{2} t^{2}) + 6 (4 r t^{3}) + 6 t^{4}, 8 {(r + t)}^{6}$

Multiply $6$ by $6$ .

$6 r^{4} + 24 (r^{3} t) + 36 (r^{2} t^{2}) + 6 (4 r t^{3}) + 6 t^{4}, 8 {(r + t)}^{6}$

Multiply $4$ by $6$ .

$6 r^{4} + 24 (r^{3} t) + 36 (r^{2} t^{2}) + 24 (r t^{3}) + 6 t^{4}, 8 {(r + t)}^{6}$

Remove parentheses.

$6 r^{4} + 24 r^{3} t + 36 r^{2} t^{2} + 24 r t^{3} + 6 t^{4}, 8 {(r + t)}^{6}$

Use the Binomial Theorem.

$6 r^{4} + 24 r^{3} t + 36 r^{2} t^{2} + 24 r t^{3} + 6 t^{4}, 8 (r^{6} + 6 r^{5} t + 15 r^{4} t^{2} + 20 r^{3} t^{3} + 15 r^{2} t^{4} + 6 r t^{5} + t^{6})$

Apply the distributive property.

$6 r^{4} + 24 r^{3} t + 36 r^{2} t^{2} + 24 r t^{3} + 6 t^{4}, 8 r^{6} + 8 (6 r^{5} t) + 8 (15 r^{4} t^{2}) + 8 (20 r^{3} t^{3}) + 8 (15 r^{2} t^{4}) + 8 (6 r t^{5}) + 8 t^{6}$

Simplify.

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Multiply $6$ by $8$ .

$6 r^{4} + 24 r^{3} t + 36 r^{2} t^{2} + 24 r t^{3} + 6 t^{4}, 8 r^{6} + 48 (r^{5} t) + 8 (15 r^{4} t^{2}) + 8 (20 r^{3} t^{3}) + 8 (15 r^{2} t^{4}) + 8 (6 r t^{5}) + 8 t^{6}$

Multiply $15$ by $8$ .

$6 r^{4} + 24 r^{3} t + 36 r^{2} t^{2} + 24 r t^{3} + 6 t^{4}, 8 r^{6} + 48 (r^{5} t) + 120 (r^{4} t^{2}) + 8 (20 r^{3} t^{3}) + 8 (15 r^{2} t^{4}) + 8 (6 r t^{5}) + 8 t^{6}$

Multiply $20$ by $8$ .

$6 r^{4} + 24 r^{3} t + 36 r^{2} t^{2} + 24 r t^{3} + 6 t^{4}, 8 r^{6} + 48 (r^{5} t) + 120 (r^{4} t^{2}) + 160 (r^{3} t^{3}) + 8 (15 r^{2} t^{4}) + 8 (6 r t^{5}) + 8 t^{6}$

Multiply $15$ by $8$ .

$6 r^{4} + 24 r^{3} t + 36 r^{2} t^{2} + 24 r t^{3} + 6 t^{4}, 8 r^{6} + 48 (r^{5} t) + 120 (r^{4} t^{2}) + 160 (r^{3} t^{3}) + 120 (r^{2} t^{4}) + 8 (6 r t^{5}) + 8 t^{6}$

Multiply $6$ by $8$ .

$6 r^{4} + 24 r^{3} t + 36 r^{2} t^{2} + 24 r t^{3} + 6 t^{4}, 8 r^{6} + 48 (r^{5} t) + 120 (r^{4} t^{2}) + 160 (r^{3} t^{3}) + 120 (r^{2} t^{4}) + 48 (r t^{5}) + 8 t^{6}$

Remove parentheses.

$6 r^{4} + 24 r^{3} t + 36 r^{2} t^{2} + 24 r t^{3} + 6 t^{4}, 8 r^{6} + 48 r^{5} t + 120 r^{4} t^{2} + 160 r^{3} t^{3} + 120 r^{2} t^{4} + 48 r t^{5} + 8 t^{6}$

Step 2

Factor out the GCF of $2$ from $6 r^{4} + 24 r^{3} t + 36 r^{2} t^{2} + 24 r t^{3} + 6 t^{4} + 8 r^{6} + 48 r^{5} t + 120 r^{4} t^{2} + 160 r^{3} t^{3} + 120 r^{2} t^{4} + 48 r t^{5} + 8 t^{6}$ .

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Factor out the GCF of $2$ from each term in the polynomial.

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Factor out the GCF of $2$ from the expression $6 r^{4}$ .

$2 (3 r^{4}) + 24 r^{3} t + 36 r^{2} t^{2} + 24 r t^{3} + 6 t^{4} + 8 r^{6} + 48 r^{5} t + 120 r^{4} t^{2} + 160 r^{3} t^{3} + 120 r^{2} t^{4} + 48 r t^{5} + 8 t^{6}$

Factor out the GCF of $2$ from the expression $24 r^{3} t$ .

$2 (3 r^{4}) + 2 (12 r^{3} t) + 36 r^{2} t^{2} + 24 r t^{3} + 6 t^{4} + 8 r^{6} + 48 r^{5} t + 120 r^{4} t^{2} + 160 r^{3} t^{3} + 120 r^{2} t^{4} + 48 r t^{5} + 8 t^{6}$

Factor out the GCF of $2$ from the expression $36 r^{2} t^{2}$ .

$2 (3 r^{4}) + 2 (12 r^{3} t) + 2 (18 r^{2} t^{2}) + 24 r t^{3} + 6 t^{4} + 8 r^{6} + 48 r^{5} t + 120 r^{4} t^{2} + 160 r^{3} t^{3} + 120 r^{2} t^{4} + 48 r t^{5} + 8 t^{6}$

Factor out the GCF of $2$ from the expression $24 r t^{3}$ .

$2 (3 r^{4}) + 2 (12 r^{3} t) + 2 (18 r^{2} t^{2}) + 2 (12 r t^{3}) + 6 t^{4} + 8 r^{6} + 48 r^{5} t + 120 r^{4} t^{2} + 160 r^{3} t^{3} + 120 r^{2} t^{4} + 48 r t^{5} + 8 t^{6}$

Factor out the GCF of $2$ from the expression $6 t^{4}$ .

$2 (3 r^{4}) + 2 (12 r^{3} t) + 2 (18 r^{2} t^{2}) + 2 (12 r t^{3}) + 2 (3 t^{4}) + 8 r^{6} + 48 r^{5} t + 120 r^{4} t^{2} + 160 r^{3} t^{3} + 120 r^{2} t^{4} + 48 r t^{5} + 8 t^{6}$

Factor out the GCF of $2$ from the expression $8 r^{6}$ .

$2 (3 r^{4}) + 2 (12 r^{3} t) + 2 (18 r^{2} t^{2}) + 2 (12 r t^{3}) + 2 (3 t^{4}) + 2 (4 r^{6}) + 48 r^{5} t + 120 r^{4} t^{2} + 160 r^{3} t^{3} + 120 r^{2} t^{4} + 48 r t^{5} + 8 t^{6}$

Factor out the GCF of $2$ from the expression $48 r^{5} t$ .

$2 (3 r^{4}) + 2 (12 r^{3} t) + 2 (18 r^{2} t^{2}) + 2 (12 r t^{3}) + 2 (3 t^{4}) + 2 (4 r^{6}) + 2 (24 r^{5} t) + 120 r^{4} t^{2} + 160 r^{3} t^{3} + 120 r^{2} t^{4} + 48 r t^{5} + 8 t^{6}$

Factor out the GCF of $2$ from the expression $120 r^{4} t^{2}$ .

$2 (3 r^{4}) + 2 (12 r^{3} t) + 2 (18 r^{2} t^{2}) + 2 (12 r t^{3}) + 2 (3 t^{4}) + 2 (4 r^{6}) + 2 (24 r^{5} t) + 2 (60 r^{4} t^{2}) + 160 r^{3} t^{3} + 120 r^{2} t^{4} + 48 r t^{5} + 8 t^{6}$

Factor out the GCF of $2$ from the expression $160 r^{3} t^{3}$ .

$2 (3 r^{4}) + 2 (12 r^{3} t) + 2 (18 r^{2} t^{2}) + 2 (12 r t^{3}) + 2 (3 t^{4}) + 2 (4 r^{6}) + 2 (24 r^{5} t) + 2 (60 r^{4} t^{2}) + 2 (80 r^{3} t^{3}) + 120 r^{2} t^{4} + 48 r t^{5} + 8 t^{6}$

Factor out the GCF of $2$ from the expression $120 r^{2} t^{4}$ .

$2 (3 r^{4}) + 2 (12 r^{3} t) + 2 (18 r^{2} t^{2}) + 2 (12 r t^{3}) + 2 (3 t^{4}) + 2 (4 r^{6}) + 2 (24 r^{5} t) + 2 (60 r^{4} t^{2}) + 2 (80 r^{3} t^{3}) + 2 (60 r^{2} t^{4}) + 48 r t^{5} + 8 t^{6}$

Factor out the GCF of $2$ from the expression $48 r t^{5}$ .

$2 (3 r^{4}) + 2 (12 r^{3} t) + 2 (18 r^{2} t^{2}) + 2 (12 r t^{3}) + 2 (3 t^{4}) + 2 (4 r^{6}) + 2 (24 r^{5} t) + 2 (60 r^{4} t^{2}) + 2 (80 r^{3} t^{3}) + 2 (60 r^{2} t^{4}) + 2 (24 r t^{5}) + 8 t^{6}$

Factor out the GCF of $2$ from the expression $8 t^{6}$ .

$2 (3 r^{4}) + 2 (12 r^{3} t) + 2 (18 r^{2} t^{2}) + 2 (12 r t^{3}) + 2 (3 t^{4}) + 2 (4 r^{6}) + 2 (24 r^{5} t) + 2 (60 r^{4} t^{2}) + 2 (80 r^{3} t^{3}) + 2 (60 r^{2} t^{4}) + 2 (24 r t^{5}) + 2 (4 t^{6})$

Since all the terms share a common factor of $2$ , it can be factored out of each term.

$2 (3 r^{4} + 12 r^{3} t + 18 r^{2} t^{2} + 12 r t^{3} + 3 t^{4} + 4 r^{6} + 24 r^{5} t + 60 r^{4} t^{2} + 80 r^{3} t^{3} + 60 r^{2} t^{4} + 24 r t^{5} + 4 t^{6})$

Step 3

The greatest common factor $GCF$ is the term in front of the factored expression.

$2$