Question

Solve the quadratic equation by factoring 12x^2-3x-9=0

Answer 1

12x^2 - 12x + 9x - 9 = 0
12x (x - 1) + 9 (x - 1) =0

(12x + 9) (x - 1) = 0

12x + 9 = 0 x - 1 = 0

x = -9/12 x = 1

Answer 2

Thank You.

Answer 3

another way :
factor the exact number for 12,3,9 which gives u 3
3(4x^2-x-3)=0
3(x-1)(4x+3)=0
3=0
x-1=0 >>> x=1
4x+3=0 >>> 4x=-3 >>> x=-3/4