Question

How do you foil `(-x-4)(4+3x)`?

Answer 1

`3x^2 - 16x - 16`

Explanation:

• `"F: " -x xx 4 = -4x`
• `"O: " 3x xx (-x) = -3x^2`
• `"I: " -4 xx 4 = -16`
• `"L: " -4 xx 3x = -12x`

So

`-4x -3x^2 - 16 - 12x`

`= -3x^2 - 16x - 16`