Question

(2a-b)^2+2(2a-b)-8 = ?

Answer 1

let (2a-b) = x ---(1)

now,

by putting the value of x in the above equation we get,

x²+2x-8

by splitting the middle term,

x²-2x+4x-8

x(x-2)+4(x-2)

(x+4)(x-2)

now by putting the value of x from (1)

(2a-b-2)(2a-b+4)

hope it is helpful..