Question

if X = a square minus 1 and Y = 1 minus b square, then find X + Y and factorise the same.​

Answer 1

Answer:X+Y=(a+b)(a-b)

Step-by-step explanation:

X=a²-1

Y=1-b²

X+Y=a²-1+1-b²

X+Y=a²-b²                        [a²-b²=(a+b)(a-b)

X+Y=(a+b)(a-b)                 {factorized form}