Question

Help pls I’m literally so confused TvT

Answer 1

(x - 10)(x + 7).

Explanation:

This is a quadratic expression and the factors are of the form (x + a)(x + b).

We have x^2 - 3x - 70.

- to find the values of a and b in this expression we need 2 numbers whose product is -70 and whose sum is -3.

They are -10 and +7 , so the factors are:

(x - 10)(x + 7).

Answer 2

`x^2 -3x -70\\\\=x^2 -10x +7x -70\\\\=x(x-10)+7(x-10)\\\\=(x+7)(x-10)`