Multiply.
-$$( x + 4 y ) ( x - 8 y )$$
A) $x ^ { 2 } - 4 x y - 32 y ^ { 2 }$
B) $x ^ { 2 } - 4 x y - 4 y ^ { 2 }$
C) $x ^ { 2 } - 7 x y - 32 y ^ { 2 }$
D) $x - 4 x y - 32 y$

Question

Quizplus · Accepted Answer

To simplify the expression, we'll use FOIL method, which means that we'll multiply the First terms, then the Outer terms, then the Inner terms, and finally the Last terms:
\begin{align*}
&(x + 4y)(x - 8y)\
=&x \cdot x + x \cdot (-8y) + 4y \cdot x + 4y \cdot (-8y)\
=&x^2 - 8xy + 4xy - 32y^2\
=&x^2 - 4xy - 32y^2
\end{align*} 
Therefore, the answer is choice 	extbf{(A)}.

Multiply - (x+4y)(x−8y)( x + 4 y ) ( x - 8 y )(x+4y)(x−8y)

Multiply
- $( x + 4 y ) ( x - 8 y )$