Question

Expand and simplify (x - 7)(x + 4)

Answer 1

`x^(2) -3x-28`

Explanation:

`(x - 7)(x + 4)\\x(x + 4)-7(x + 4)\\x^(2) +4x-7x-28\\x^(2) -3x-28`

Answer 2

x^2 - 3x - 28

Explanation:

(x-7)(x+4) = x^2 + 4x - 7x - 28 according to the distributive property

Which = x^2 - 3x - 28