Question

How do you factor the trinomial `3x^2 + 3x - 60 = 0`?

Answer 1

You first take out the obvious factor `3`

Explanation:

`->3(x^2+1*x-20)=0`

We need two numbers that add up to `1` and multiply to `-20`

These are `-4and+5`

`->3(x-4)(x+5)=0`

Solutions to the equation are `x=+4orx=-5`