Question

how do you factor 5x^2-11x+36=0 and 3x^2-15x-18?

Answer 1

are you sure you typed the 1st equation right?
On 2nd factor out 3

Answer 2

um.. how?

Answer 3

3x^2-15x-18=3*x^2-3*5x-3*6=3(x^2-5x-6)

Answer 4

I don't understand how you can find x.

Answer 5

3x^2-15x-18=3(x^2-5x-6)=3(x-6)(x+1)
x=6 or x=-1

Answer 6

Here you could find good explanation
http://www.purplemath.com/modules/factquad.htm