Question 21743
You must use the foil method,in reverse, do you know how????

4x^2 - 2x - 30
(4x+10)(x-3)       to check use foil
                   first numbers 4x*x = 4x^2
                   outside numbers  4x* -3 =-12x
                   inside numbers   10 * x = 10x
                   last numbers     10*-3  = -30
                   you get 4x^2 -12x+10x-30
                           4X^2-2x-30