Question

factorise
I. x^2 - 1 - 2y - y
II. 4(x-y)^2 - 12(x-y) + 9

Answer 1

Answer:

Given (x - y)^2 - 4(x - y) - 45 can be written as

         x^2 - 2xy - 4x + y^2 + 4y - 45

        (x - y - 9) ( x - y + 5)

       x - y = 9 (or) x - y = -5.

Step-by-step explanation: