问题
解答题
计算:(1)(-3)2-|-
(2)(3x3y2z-1)-2•(5xy-2z3)2. |
答案
(1)原式=9-
+1 2
-11 2
=8;
(2)原式=(
)25xy-2z3 3x3y2z-1
=(
)25xz3 y2 3x3y2 z
=(
)25xz4 3x3y4
=
.25z8 9x4y8
计算:(1)(-3)2-|-
(2)(3x3y2z-1)-2•(5xy-2z3)2. |
(1)原式=9-
+1 2
-11 2
=8;
(2)原式=(
)25xy-2z3 3x3y2z-1
=(
)25xz3 y2 3x3y2 z
=(
)25xz4 3x3y4
=
.25z8 9x4y8