Question

solve the following equation 3x²+5x-12=0​

Answer 1

given 3x²+5x-12=0

Step-by-step explanation:

AC = 3*12 =-36

which differs by B = 5

The pair 9,-4 works

Use this pair to split the middle term, then factor

by grouping:

0=3x²+5x-12

(3x²+9x)+(-4x-12)

3x(x+3)-3(x+3)

(3x-3)+(x+3)

3x-3=0 , x+3=0

3x=3 , x=-3

x=3/3 , x=-3

x=1 and -3