Question

factorisation
3(x-4)^2-5(x-4)-12​

Answer 1

Answer:

let x-4 be a

so,3x^2-5x-12

》3x^2-(9-4)x-12

》3x^2-9x+4x-12

》3x(3x-3)+4(3x-3)

》(3x-3)(3x+4)

》{3(x-4)-3}{3(x-4)+4} (SUBSTITUTING THE VALUE OF A)

》(3x-15)(3x-8)

HOPE IT HELPS YOU