Question

(3a-2b)²-4(3a-2b)-21​

Answer 1

Answer:

9a^2+4b^2-12ab-12a+8b-21

Step-by-step explanation:

Answer 2

Answer:

let 3a - 2b be x

so,

so,x^2 - 4x -21

so,x^2 - 4x -21x^2 - 7x+3x -21

so,x^2 - 4x -21x^2 - 7x+3x -21x ( x+7) +3 (x+7)

so,x^2 - 4x -21x^2 - 7x+3x -21x ( x+7) +3 (x+7)(x+7) (x+3)

now put 3a -2b in place of x

(3a-2b +7) (3a - 2b +3)