因式分解（5x-3y)^2-(3x-5y)^2

(1)(5x-3y)^2-(3x-5y)^2 =[(5x-3y)+(3x-5y)][(5x-3y)-(3x-5y)]=(8x-8y)(2x+2y)=16(x+y)(x-y)(2)(a+2b)^2-4(a-b)^2=(a+2b)^2-[2(a-b)]^2=[(a+2b)+2(a-b)][(a+2b)-2(a-b)]=3a(-a+4b) (3)(x+y)^2-4(x+y)+4=[(x+y)-2]^2=...