Type a math problem

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Type a math problem

Evaluate

x^{2}-81

$x_{2}−81$

Solution Steps

(x+9)(x-9)

$(x+9)(x−9)$

Multiplication can be transformed into difference of squares using the rule: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}.

Multiplication can be transformed into difference of squares using the rule: $(a−b)(a+b)=a_{2}−b_{2}$.

x^{2}-9^{2}

$x_{2}−9_{2}$

Calculate 9 to the power of 2 and get 81.

Calculate $9$ to the power of $2$ and get $81$.

x^{2}-81

$x_{2}−81$

Expand

x^{2}-81

$x_{2}−81$

Solution Steps

(x+9)(x-9)

$(x+9)(x−9)$

Multiplication can be transformed into difference of squares using the rule: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}.

Multiplication can be transformed into difference of squares using the rule: $(a−b)(a+b)=a_{2}−b_{2}$.

x^{2}-9^{2}

$x_{2}−9_{2}$

Calculate 9 to the power of 2 and get 81.

Calculate $9$ to the power of $2$ and get $81$.

x^{2}-81

$x_{2}−81$

Graph

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x^{2}-9^{2}

Multiplication can be transformed into difference of squares using the rule: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}.

x^{2}-81

Calculate 9 to the power of 2 and get 81.

x^{2}-9^{2}

x^{2}-81

Calculate 9 to the power of 2 and get 81.

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