Multiply.
-$\left( x ^ { 2 } + 8 y \right) \left( x ^ { 2 } - 8 y \right)$
A) $x ^ { 4 } - 64 y ^ { 2 }$
B) $x ^ { 4 } - 16 x ^ { 2 } y - 64 y ^ { 2 }$
C) $x ^ { 4 } - 16 y ^ { 2 }$
D) $x ^ { 4 } + 16 x ^ { 2 } y - 64 y ^ { 2 }$

Question

Quizplus · Accepted Answer

This is an application of the difference of squares formula, $a^2 - b^2 = (a + b)(a - b)$, where $a = x^2$ and $b = 8y$.

Multiply - (x2+8y)(x2−8y)\left( x ^ { 2 } + 8 y \right) \left( x ^ { 2 } - 8 y \right)(x2+8y)(x2−8y)

Multiply
- $\left( x ^ { 2 } + 8 y \right) \left( x ^ { 2 } - 8 y \right)$