Question

$- 3x {}^{2} + 5x + 12 = 0$

Solve by formula method​

Answer 1

Answer:

x = 3 , -4/3

Step-by-step explanation:

-3x²+5x+12 = 0

=> 3x²-5x-12 = 0

=> 3x²-(9-4)x-12 = 0

=> 3x²-9x+4x-12 = 0

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

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

=> x-3 = 0 => 3x+4 = 0

=> x = 3 => x = -4/3