Pre-Algebra Examples

$20 {(r + t)}^{3}$ , $16 {(r + t)}^{6}$

Step 1

Simplify each term.

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Use the Binomial Theorem.

$20 (r^{3} + 3 r^{2} t + 3 r t^{2} + t^{3}), 16 {(r + t)}^{6}$

Apply the distributive property.

$20 r^{3} + 20 (3 r^{2} t) + 20 (3 r t^{2}) + 20 t^{3}, 16 {(r + t)}^{6}$

Simplify.

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Multiply $3$ by $20$ .

$20 r^{3} + 60 (r^{2} t) + 20 (3 r t^{2}) + 20 t^{3}, 16 {(r + t)}^{6}$

Multiply $3$ by $20$ .

$20 r^{3} + 60 (r^{2} t) + 60 (r t^{2}) + 20 t^{3}, 16 {(r + t)}^{6}$

Remove parentheses.

$20 r^{3} + 60 r^{2} t + 60 r t^{2} + 20 t^{3}, 16 {(r + t)}^{6}$

Use the Binomial Theorem.

$20 r^{3} + 60 r^{2} t + 60 r t^{2} + 20 t^{3}, 16 (r^{6} + 6 r^{5} t + 15 r^{4} t^{2} + 20 r^{3} t^{3} + 15 r^{2} t^{4} + 6 r t^{5} + t^{6})$

Apply the distributive property.

$20 r^{3} + 60 r^{2} t + 60 r t^{2} + 20 t^{3}, 16 r^{6} + 16 (6 r^{5} t) + 16 (15 r^{4} t^{2}) + 16 (20 r^{3} t^{3}) + 16 (15 r^{2} t^{4}) + 16 (6 r t^{5}) + 16 t^{6}$

Simplify.

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Multiply $6$ by $16$ .

$20 r^{3} + 60 r^{2} t + 60 r t^{2} + 20 t^{3}, 16 r^{6} + 96 (r^{5} t) + 16 (15 r^{4} t^{2}) + 16 (20 r^{3} t^{3}) + 16 (15 r^{2} t^{4}) + 16 (6 r t^{5}) + 16 t^{6}$

Multiply $15$ by $16$ .

$20 r^{3} + 60 r^{2} t + 60 r t^{2} + 20 t^{3}, 16 r^{6} + 96 (r^{5} t) + 240 (r^{4} t^{2}) + 16 (20 r^{3} t^{3}) + 16 (15 r^{2} t^{4}) + 16 (6 r t^{5}) + 16 t^{6}$

Multiply $20$ by $16$ .

$20 r^{3} + 60 r^{2} t + 60 r t^{2} + 20 t^{3}, 16 r^{6} + 96 (r^{5} t) + 240 (r^{4} t^{2}) + 320 (r^{3} t^{3}) + 16 (15 r^{2} t^{4}) + 16 (6 r t^{5}) + 16 t^{6}$

Multiply $15$ by $16$ .

$20 r^{3} + 60 r^{2} t + 60 r t^{2} + 20 t^{3}, 16 r^{6} + 96 (r^{5} t) + 240 (r^{4} t^{2}) + 320 (r^{3} t^{3}) + 240 (r^{2} t^{4}) + 16 (6 r t^{5}) + 16 t^{6}$

Multiply $6$ by $16$ .

$20 r^{3} + 60 r^{2} t + 60 r t^{2} + 20 t^{3}, 16 r^{6} + 96 (r^{5} t) + 240 (r^{4} t^{2}) + 320 (r^{3} t^{3}) + 240 (r^{2} t^{4}) + 96 (r t^{5}) + 16 t^{6}$

Remove parentheses.

$20 r^{3} + 60 r^{2} t + 60 r t^{2} + 20 t^{3}, 16 r^{6} + 96 r^{5} t + 240 r^{4} t^{2} + 320 r^{3} t^{3} + 240 r^{2} t^{4} + 96 r t^{5} + 16 t^{6}$

Step 2

Factor out the GCF of $4$ from $20 r^{3} + 60 r^{2} t + 60 r t^{2} + 20 t^{3} + 16 r^{6} + 96 r^{5} t + 240 r^{4} t^{2} + 320 r^{3} t^{3} + 240 r^{2} t^{4} + 96 r t^{5} + 16 t^{6}$ .

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Factor out the GCF of $4$ from each term in the polynomial.

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Factor out the GCF of $4$ from the expression $20 r^{3}$ .

$4 (5 r^{3}) + 60 r^{2} t + 60 r t^{2} + 20 t^{3} + 16 r^{6} + 96 r^{5} t + 240 r^{4} t^{2} + 320 r^{3} t^{3} + 240 r^{2} t^{4} + 96 r t^{5} + 16 t^{6}$

Factor out the GCF of $4$ from the expression $60 r^{2} t$ .

$4 (5 r^{3}) + 4 (15 r^{2} t) + 60 r t^{2} + 20 t^{3} + 16 r^{6} + 96 r^{5} t + 240 r^{4} t^{2} + 320 r^{3} t^{3} + 240 r^{2} t^{4} + 96 r t^{5} + 16 t^{6}$

Factor out the GCF of $4$ from the expression $60 r t^{2}$ .

$4 (5 r^{3}) + 4 (15 r^{2} t) + 4 (15 r t^{2}) + 20 t^{3} + 16 r^{6} + 96 r^{5} t + 240 r^{4} t^{2} + 320 r^{3} t^{3} + 240 r^{2} t^{4} + 96 r t^{5} + 16 t^{6}$

Factor out the GCF of $4$ from the expression $20 t^{3}$ .

$4 (5 r^{3}) + 4 (15 r^{2} t) + 4 (15 r t^{2}) + 4 (5 t^{3}) + 16 r^{6} + 96 r^{5} t + 240 r^{4} t^{2} + 320 r^{3} t^{3} + 240 r^{2} t^{4} + 96 r t^{5} + 16 t^{6}$

Factor out the GCF of $4$ from the expression $16 r^{6}$ .

$4 (5 r^{3}) + 4 (15 r^{2} t) + 4 (15 r t^{2}) + 4 (5 t^{3}) + 4 (4 r^{6}) + 96 r^{5} t + 240 r^{4} t^{2} + 320 r^{3} t^{3} + 240 r^{2} t^{4} + 96 r t^{5} + 16 t^{6}$

Factor out the GCF of $4$ from the expression $96 r^{5} t$ .

$4 (5 r^{3}) + 4 (15 r^{2} t) + 4 (15 r t^{2}) + 4 (5 t^{3}) + 4 (4 r^{6}) + 4 (24 r^{5} t) + 240 r^{4} t^{2} + 320 r^{3} t^{3} + 240 r^{2} t^{4} + 96 r t^{5} + 16 t^{6}$

Factor out the GCF of $4$ from the expression $240 r^{4} t^{2}$ .

$4 (5 r^{3}) + 4 (15 r^{2} t) + 4 (15 r t^{2}) + 4 (5 t^{3}) + 4 (4 r^{6}) + 4 (24 r^{5} t) + 4 (60 r^{4} t^{2}) + 320 r^{3} t^{3} + 240 r^{2} t^{4} + 96 r t^{5} + 16 t^{6}$

Factor out the GCF of $4$ from the expression $320 r^{3} t^{3}$ .

$4 (5 r^{3}) + 4 (15 r^{2} t) + 4 (15 r t^{2}) + 4 (5 t^{3}) + 4 (4 r^{6}) + 4 (24 r^{5} t) + 4 (60 r^{4} t^{2}) + 4 (80 r^{3} t^{3}) + 240 r^{2} t^{4} + 96 r t^{5} + 16 t^{6}$

Factor out the GCF of $4$ from the expression $240 r^{2} t^{4}$ .

$4 (5 r^{3}) + 4 (15 r^{2} t) + 4 (15 r t^{2}) + 4 (5 t^{3}) + 4 (4 r^{6}) + 4 (24 r^{5} t) + 4 (60 r^{4} t^{2}) + 4 (80 r^{3} t^{3}) + 4 (60 r^{2} t^{4}) + 96 r t^{5} + 16 t^{6}$

Factor out the GCF of $4$ from the expression $96 r t^{5}$ .

$4 (5 r^{3}) + 4 (15 r^{2} t) + 4 (15 r t^{2}) + 4 (5 t^{3}) + 4 (4 r^{6}) + 4 (24 r^{5} t) + 4 (60 r^{4} t^{2}) + 4 (80 r^{3} t^{3}) + 4 (60 r^{2} t^{4}) + 4 (24 r t^{5}) + 16 t^{6}$

Factor out the GCF of $4$ from the expression $16 t^{6}$ .

$4 (5 r^{3}) + 4 (15 r^{2} t) + 4 (15 r t^{2}) + 4 (5 t^{3}) + 4 (4 r^{6}) + 4 (24 r^{5} t) + 4 (60 r^{4} t^{2}) + 4 (80 r^{3} t^{3}) + 4 (60 r^{2} t^{4}) + 4 (24 r t^{5}) + 4 (4 t^{6})$

Since all the terms share a common factor of $4$ , it can be factored out of each term.

$4 (5 r^{3} + 15 r^{2} t + 15 r t^{2} + 5 t^{3} + 4 r^{6} + 24 r^{5} t + 60 r^{4} t^{2} + 80 r^{3} t^{3} + 60 r^{2} t^{4} + 24 r t^{5} + 4 t^{6})$

Step 3

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

$4$