Question

if x= 2 and y = -4, evaluate xy + 2x - 2y

Answer 1

To evaluate xy + 2x - 2y, we need to replace x by 2 and y by -4 as:

$\begin{gathered} xy+2x-2y \\ 2(-4)+2(2)-2(-4) \end{gathered}$

So, solving the multiplication and then adding the numbers, we get:

$\begin{gathered} 2(-4)+2(2)-2(-4) \\ -8+4+8 \\ 4 \end{gathered}$

Answer: 4