Question

write the expansion of (x-y)^2 using the identity factorise 4x^2-12x+9​

Answer 1

(x-y)^2= x^2+y^2-2xy

Similaryly,

4x^2-12x+19

=(2x)^2+(3)^2-2×2x×3

=(2x-3)^2

Answer 2

Answer:

given 4x^2-12x+9.

(2x)^2+(-3)^2-2.2x.3.

(2x-3)^2.