Question

(i) x2 + (4 - 3a)x - 12a = 0. by formula only​

Answer 1

x² + (4 - 3a)x - 12a

x² + 4x - 3ax - 12a

x(x + 4) -3a(x + 4)

(x - 3a)(x + 4)

Answer 2

Refer the attachment for the answer