How do you factor - 3x^2+5x+12=0

-3x^2 + 5x + 12 = 0

-3*12 = - 36

Now 9 * - 4 = - 36 and 9 - 4 = + 5 so we write:-

-3x^2 + 9x - 4x + 12 = 0

-3x (x - 3) - 4 (x - 3) = 0

(x - 3) is common so we have the answer which is:-

(-3x - 4) (x - 3) = 0

- (3^2x-5x-12) = 0

- (3x+4) (x-3) = 0

x = 4/3 & x = - 3

is the answers