问题
解答题
计算: (1)(-4ab3)•(-2ab)-(2ab2)2; (2)(-3x2y)2•(-
|
答案
(1)(-4ab3)•(-2ab)-(2ab2)2
=8a2b4-4a2b4
=4a2b4;
(2)(-3x2y)2•(-
xyz)•2 3
xz23 4
=9x4y2•(-
xyz)•2 3
xz23 4
=-
x6y3z3.9 2
计算: (1)(-4ab3)•(-2ab)-(2ab2)2; (2)(-3x2y)2•(-
|
(1)(-4ab3)•(-2ab)-(2ab2)2
=8a2b4-4a2b4
=4a2b4;
(2)(-3x2y)2•(-
xyz)•2 3
xz23 4
=9x4y2•(-
xyz)•2 3
xz23 4
=-
x6y3z3.9 2