Question

(x2 – 7)(x2 – 4)
use FOIL to solve

Answer 1

answer is 0

Make sure to read the bottom, too

`x2 -7 * x2 - 4\\\\\\problem1\\x2 = 2 * number\\so\\2 * 2 = 4\\4 - 7 = 3\\problem1 = 3\\\\problem2\\2 * 2 = 4\\4 - 4 = 0\\problem2 = 0\\\\\\lastly\\3 * 0 = 0\\\\\\therefore,\\0.`

Note that the result may vary depending on the value you assign to x.