题目内容
(1)求
(2)化简5a3-2a2+a-2(a3-3a2)-1
(2)化简5a3-2a2+a-2(a3-3a2)-1
解:(1)
=2x2-0.75+
x-(-10﹣x2+3x),
=2x2-0.75+
x+10+x2-3x,
=3x2-
x+9.25.
(2)原式=5a3-2a2+a-2a3+6a2-1,
=3a3+4a2+a﹣1.
=2x2-0.75+
=2x2-0.75+
=3x2-
(2)原式=5a3-2a2+a-2a3+6a2-1,
=3a3+4a2+a﹣1.
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