Question

How do you solve the equation by factoring or the quadratic formula `x^2+ 3x - 28 = 0`?

Answer 1

Find the factors of 28 that will subtract to give 3 i.e. 4 and 7. Then factorise the expression

Explanation:

`x^2+3x-28 = (x+4)(x-7)`
Therefore `x=-4` or `x=7`