(x+y)^2-10(x+y)^2+25

(x+y)^2-10(x+y)^2+25

(x+y)^2-10(x+y)^2+25
=25-9(x+y)^2
=(5-3x-3y)(5+3x+3y)

25（x-y）2+10（y-x）+1．

25（x-y）2+10（y-x）+1=[5（x-y）]2-2×1×5（x-y）+12=[5（x-y）-1]2=（5x-5y-1）2．

The square of factorization factor (X-Y) - 8 (X-Y) - 16
Square of (2a-3b) - square of 4 (a-2b) - square of (a-2b) - 8ab

The square of (X-Y) - 8 (X-Y) x 16 = (X-Y-4) &# 178; (2a-3b) - 4 (a + b) = [(2a-3b) + 2 (a + b)] [(2a-3b) - 2 (a + b)] = - 5B (4a-b) (a-2b) square x 8ab = A & # 178; - 4AB + 4B & # 178; + 8ab = A & # 178; + 4AB + 4B & # 178; = (a + 2b) &# 178