Finite Math Examples

${(9 b - 3 d + 2 g)}^{2}$

Step 1

Rewrite ${(9 b - 3 d + 2 g)}^{2}$ as $(9 b - 3 d + 2 g) (9 b - 3 d + 2 g)$ .

$(9 b - 3 d + 2 g) (9 b - 3 d + 2 g)$

Step 2

Expand $(9 b - 3 d + 2 g) (9 b - 3 d + 2 g)$ by multiplying each term in the first expression by each term in the second expression.

$9 b (9 b) + 9 b (- 3 d) + 9 b (2 g) - 3 d (9 b) - 3 d (- 3 d) - 3 d (2 g) + 2 g (9 b) + 2 g (- 3 d) + 2 g (2 g)$

Step 3

Simplify each term.

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Step 3.1

Rewrite using the commutative property of multiplication.

$9 \cdot 9 b \cdot b + 9 b (- 3 d) + 9 b (2 g) - 3 d (9 b) - 3 d (- 3 d) - 3 d (2 g) + 2 g (9 b) + 2 g (- 3 d) + 2 g (2 g)$

Step 3.2

Multiply $b$ by $b$ by adding the exponents.

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Step 3.2.1

Move $b$ .

$9 \cdot 9 (b \cdot b) + 9 b (- 3 d) + 9 b (2 g) - 3 d (9 b) - 3 d (- 3 d) - 3 d (2 g) + 2 g (9 b) + 2 g (- 3 d) + 2 g (2 g)$

Step 3.2.2

Multiply $b$ by $b$ .

$9 \cdot 9 b^{2} + 9 b (- 3 d) + 9 b (2 g) - 3 d (9 b) - 3 d (- 3 d) - 3 d (2 g) + 2 g (9 b) + 2 g (- 3 d) + 2 g (2 g)$

Step 3.3

Multiply $9$ by $9$ .

$81 b^{2} + 9 b (- 3 d) + 9 b (2 g) - 3 d (9 b) - 3 d (- 3 d) - 3 d (2 g) + 2 g (9 b) + 2 g (- 3 d) + 2 g (2 g)$

Step 3.4

Rewrite using the commutative property of multiplication.

$81 b^{2} + 9 \cdot - 3 b d + 9 b (2 g) - 3 d (9 b) - 3 d (- 3 d) - 3 d (2 g) + 2 g (9 b) + 2 g (- 3 d) + 2 g (2 g)$

Step 3.5

Multiply $9$ by $- 3$ .

$81 b^{2} - 27 b d + 9 b (2 g) - 3 d (9 b) - 3 d (- 3 d) - 3 d (2 g) + 2 g (9 b) + 2 g (- 3 d) + 2 g (2 g)$

Step 3.6

Rewrite using the commutative property of multiplication.

$81 b^{2} - 27 b d + 9 \cdot 2 b g - 3 d (9 b) - 3 d (- 3 d) - 3 d (2 g) + 2 g (9 b) + 2 g (- 3 d) + 2 g (2 g)$

Step 3.7

Multiply $9$ by $2$ .

$81 b^{2} - 27 b d + 18 b g - 3 d (9 b) - 3 d (- 3 d) - 3 d (2 g) + 2 g (9 b) + 2 g (- 3 d) + 2 g (2 g)$

Step 3.8

Rewrite using the commutative property of multiplication.

$81 b^{2} - 27 b d + 18 b g - 3 \cdot 9 d b - 3 d (- 3 d) - 3 d (2 g) + 2 g (9 b) + 2 g (- 3 d) + 2 g (2 g)$

Step 3.9

Multiply $- 3$ by $9$ .

$81 b^{2} - 27 b d + 18 b g - 27 d b - 3 d (- 3 d) - 3 d (2 g) + 2 g (9 b) + 2 g (- 3 d) + 2 g (2 g)$

Step 3.10

Rewrite using the commutative property of multiplication.

$81 b^{2} - 27 b d + 18 b g - 27 d b - 3 \cdot - 3 d \cdot d - 3 d (2 g) + 2 g (9 b) + 2 g (- 3 d) + 2 g (2 g)$

Step 3.11

Multiply $d$ by $d$ by adding the exponents.

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Step 3.11.1

Move $d$ .

$81 b^{2} - 27 b d + 18 b g - 27 d b - 3 \cdot - 3 (d \cdot d) - 3 d (2 g) + 2 g (9 b) + 2 g (- 3 d) + 2 g (2 g)$

Step 3.11.2

Multiply $d$ by $d$ .

$81 b^{2} - 27 b d + 18 b g - 27 d b - 3 \cdot - 3 d^{2} - 3 d (2 g) + 2 g (9 b) + 2 g (- 3 d) + 2 g (2 g)$

Step 3.12

Multiply $- 3$ by $- 3$ .

$81 b^{2} - 27 b d + 18 b g - 27 d b + 9 d^{2} - 3 d (2 g) + 2 g (9 b) + 2 g (- 3 d) + 2 g (2 g)$

Step 3.13

Rewrite using the commutative property of multiplication.

$81 b^{2} - 27 b d + 18 b g - 27 d b + 9 d^{2} - 3 \cdot 2 d g + 2 g (9 b) + 2 g (- 3 d) + 2 g (2 g)$

Step 3.14

Multiply $- 3$ by $2$ .

$81 b^{2} - 27 b d + 18 b g - 27 d b + 9 d^{2} - 6 d g + 2 g (9 b) + 2 g (- 3 d) + 2 g (2 g)$

Step 3.15

Rewrite using the commutative property of multiplication.

$81 b^{2} - 27 b d + 18 b g - 27 d b + 9 d^{2} - 6 d g + 2 \cdot 9 g b + 2 g (- 3 d) + 2 g (2 g)$

Step 3.16

Multiply $2$ by $9$ .

$81 b^{2} - 27 b d + 18 b g - 27 d b + 9 d^{2} - 6 d g + 18 g b + 2 g (- 3 d) + 2 g (2 g)$

Step 3.17

Rewrite using the commutative property of multiplication.

$81 b^{2} - 27 b d + 18 b g - 27 d b + 9 d^{2} - 6 d g + 18 g b + 2 \cdot - 3 g d + 2 g (2 g)$

Step 3.18

Multiply $2$ by $- 3$ .

$81 b^{2} - 27 b d + 18 b g - 27 d b + 9 d^{2} - 6 d g + 18 g b - 6 g d + 2 g (2 g)$

Step 3.19

Rewrite using the commutative property of multiplication.

$81 b^{2} - 27 b d + 18 b g - 27 d b + 9 d^{2} - 6 d g + 18 g b - 6 g d + 2 \cdot 2 g \cdot g$

Step 3.20

Multiply $g$ by $g$ by adding the exponents.

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Step 3.20.1

Move $g$ .

$81 b^{2} - 27 b d + 18 b g - 27 d b + 9 d^{2} - 6 d g + 18 g b - 6 g d + 2 \cdot 2 (g \cdot g)$

Step 3.20.2

Multiply $g$ by $g$ .

$81 b^{2} - 27 b d + 18 b g - 27 d b + 9 d^{2} - 6 d g + 18 g b - 6 g d + 2 \cdot 2 g^{2}$

Step 3.21

Multiply $2$ by $2$ .

$81 b^{2} - 27 b d + 18 b g - 27 d b + 9 d^{2} - 6 d g + 18 g b - 6 g d + 4 g^{2}$

Step 4

Subtract $27 d b$ from $- 27 b d$ .

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Step 4.1

Move $d$ .

$81 b^{2} - 27 b d - 27 b d + 18 b g + 9 d^{2} - 6 d g + 18 g b - 6 g d + 4 g^{2}$

Step 4.2

Subtract $27 b d$ from $- 27 b d$ .

$81 b^{2} - 54 b d + 18 b g + 9 d^{2} - 6 d g + 18 g b - 6 g d + 4 g^{2}$

Step 5

Add $18 b g$ and $18 g b$ .

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Step 5.1

Move $g$ .

$81 b^{2} - 54 b d + 9 d^{2} - 6 d g + 18 b g + 18 b g - 6 g d + 4 g^{2}$

Step 5.2

Add $18 b g$ and $18 b g$ .

$81 b^{2} - 54 b d + 9 d^{2} - 6 d g + 36 b g - 6 g d + 4 g^{2}$

Step 6

Subtract $6 g d$ from $- 6 d g$ .

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Step 6.1

Move $g$ .

$81 b^{2} - 54 b d + 9 d^{2} - 6 d g - 6 d g + 36 b g + 4 g^{2}$

Step 6.2

Subtract $6 d g$ from $- 6 d g$ .

$81 b^{2} - 54 b d + 9 d^{2} - 12 d g + 36 b g + 4 g^{2}$

Step 7

Move $- 12 d g$ .

$81 b^{2} - 54 b d + 9 d^{2} + 36 b g - 12 d g + 4 g^{2}$

Step 8

Move $9 d^{2}$ .

$81 b^{2} - 54 b d + 36 b g + 9 d^{2} - 12 d g + 4 g^{2}$