Question

factorise using appopriate identities:

4(x - 3y)² - 28(x -3y) + 49​

Answer 1

Answer:

let x-3y = t

4t² -28t +49

4t²-14t-14t+49

2t(2t-7) -7(2t-7)

(2t-7) (2t-7)

(2t-7)²

{2(x-3y) -7}²

(2x-6y-7)² Ans