Question

I only need help with the top one

Answer 1

The answer to the top question is x²-3x-28

Answer 2

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

Explanation:

Step 1: Foil out the expression

`(x + 4)(x - 7)`

`(x * x) + (x * -7) + (4 * x) + (4 * -7)`

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

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

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