Let f(x) =x+7 and g(x)= x-4. find f(x) times g(x)

x² + 3x - 28

Step-by-step explanation:

We need f(x)*g(x), or

(x + 7)(x - 4)

Use FOIL to multiply, Foil is Firsts, Outsides, Insides, Lasts.  It tells you the terms to multiply together...

Firsts:         x(x) = x²

Outsides:    x(-4) = -4x

Insides:      7(x) = 7x

Lasts:        (7)(-4) = -28

So we have

x² - 4x + 7x - 28

simplify to

x² + 3x - 28

answer: -2+√x,-2-√x

i hope this , i don't know if you're looking for a pair or not.