计算(a-b)(a-b)其结果为( )
A.a2-b2 B.a2+b2 C.a2-2ab+b2 D.a2-2ab-b2
计算:(4x2-2xy+y2)(2x+y).
计算:(3x-y)(x+2y)=________.
计算:(x-3)(3x-4)=_________;
计算:(3a-2)(2a+5)=________;
计算:(a+2b)(a-b)=_________;