计算: ①(6m2-4mn-3n2)-(2m2-4mn+n2) ②(-3a2b3
题型:解答题
问题:
计算:
①(6m2-4mn-3n2)-(2m2-4mn+n2)
②(-3a2b3)2•4(-a3b)3;
③(x-3)2-2(x+2)(x-2);
④(2x-y+1)(2x+y-1);
⑤(a+b)2(a-b)2;
⑥因式分4a2x2+8axy+12axy2.
计算:
①(6m2-4mn-3n2)-(2m2-4mn+n2)
②(-3a2b3)2•4(-a3b)3;
③(x-3)2-2(x+2)(x-2);
④(2x-y+1)(2x+y-1);
⑤(a+b)2(a-b)2;
⑥因式分4a2x2+8axy+12axy2.