题目内容
合并同类项:
(1)15x+4x-10x
(2)-p2-p2-p2
(3)3x2y-3xy2+2yx2-y2x
(4)
a2b-0.4ab2-
a2b+
ab2
(1)15x+4x-10x
(2)-p2-p2-p2
(3)3x2y-3xy2+2yx2-y2x
(4)
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(1)15x+4x-10x
=(15+4-10)x
=9x
(2)-p2-p2-p2=-3p2
(3)3x2y-3xy2+2yx2-y2x=5x2y-4xy2
(4)
a2b-0.4ab2-
a2b+
ab2
=(
-
)a2b
=-
a2b.
=(15+4-10)x
=9x
(2)-p2-p2-p2=-3p2
(3)3x2y-3xy2+2yx2-y2x=5x2y-4xy2
(4)
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=(
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=-
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