Question

What is the value of –2x2 + 4y if x = –2 and y = 3?

Answer 1

Simplify

((-2)(-2))(2)+(4)(3)

The answer is 20.

Answer 2

You would first substitute x and y into the equation so: -2(-2)^2+4(3)

Then you solve:

-2(-2)^2+4(3)

8+12

so your answer will be 20