问题
解答题
计算:
①(a+b)2(a2-2ab+b2) ②(x+5)2-(x-2)(x-3) ③10022
答案
①(a+b)2(a2-2ab+b2),
=(a+b)2(a-b)2,
=(a2-b2)2,
=a4-2a2b2+b4;
②(x+5)2-(x-2)(x-3),
=(x2+10x+25)-(x2-5x+6),
=15x+19;
③10022,
=(1000+2)2,
=10002+2×1000×2+22,
=1004004.