Question

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

Answer 1

-(3^2x-5x-12)=0
-(3x+4)(x-3) =0
x= 4/3 & x= -3
is the answers

Answer 2

-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