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约分:56x3yz448x5y2z=7z36x2y7z36x2y;x2−9x2−2x−3=x+3x+1x+3x+1.

题目详情
约分:
56x3yz4
48x5y2z
=
7z3
6x2y
7z3
6x2y
x2−9
x2−2x−3
=
x+3
x+1
x+3
x+1
▼优质解答
答案和解析
56x3yz4
48x5y2z
=
56x3yz4÷8x3yz
48x5y2z÷8x3yz
=
7z3
6x2y


x2−9
x2−2x−3
=
(x+3)(x−3)
(x−3)(x+1)
=
x+3
x+1

故答案是:
7z3
6x2y
x+3
x+1