Question

(x-2y+3)² + (x+2y-3)²

Answer 1

f a³ - b³ = ( a - b) (a² + ab + b²) So we get [ (x-2y) - (2x-y) ] [ (x-2y)² + (x-2y)(2x-y) + (2x-y)² ] = - (x + y) [ 7 x² + 7 y² - 13 x y ]

Answer 2

answer will be 2x²+8y²+18-24y.