Question

What is the value of 36x - 8y to the power of 2, when x=3 and y= -6

Answer 1

`(36x-8y)^(2)`


`[36(3)-8(-6)]^2`


`(108+48)^2`


`156 ^(2)`


`=24336`

Answer 2

`36x-8y^2 \hbox{ when } x=3 \hbox{ and } y=-6 \\ \\ 36 * 3 -8 * (-6)^2=3 * 36 - 8 * 36=(3-8) * 36= -5 * 36=\\ =\boxed{-180}`