Question

X^2+12x-45 factor the trinomial

Answer 1

So here we have the trinomial:

`x^2+12x-45`

To factor it, we are going to ask for two numbers, whose sum is 12 and their multiplication is -45.

These numbers are 15 and -3.

Now, we put these numbers into the following brackets:

`(x+15)(x-3)`

And that's the factored form.

We obtained 15 and -3 after trying a lot of values. That's an essay on error.

You have to try too many pair of numbers until you get the correct ones.