问题
解答题
计算:
(1)-(6x2)2+(-3x)3•x;
(2)(-m-n)(-m+n).
答案
(1)-(6x2)2+(-3x)3•x,
=-36x4-27x4•x,
=-36x4-27x4,
=-63x4;
(2)(-m-n)(-m+n),
=(-m)2-n2,
=m2-n2.
计算:
(1)-(6x2)2+(-3x)3•x;
(2)(-m-n)(-m+n).
(1)-(6x2)2+(-3x)3•x,
=-36x4-27x4•x,
=-36x4-27x4,
=-63x4;
(2)(-m-n)(-m+n),
=(-m)2-n2,
=m2-n2.