9x^2(a-b)+y^2(b-a)
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9x^2(a-b)+y^2(b-a)9x^2(a-b)+y^2(b-a)9x^2(a-b)+y^2(b-a)9x^2(a-b)+y^2(b-a)=9x^2(a-b)-y^2(a-b)=(a-b)(9x
9x^2(a-b)+y^2(b-a)
9x^2(a-b)+y^2(b-a)
9x^2(a-b)+y^2(b-a)
9x^2(a-b)+y^2(b-a)
=9x^2(a-b)-y^2(a-b)
=(a-b)(9x^2-y^2)
=(a-b)(3x+y)(3x-y)
9x^2(a-b)+y^2(b-a)
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数学分式和2次根式的题目计算(b/a-a/b)÷a/a+b的结果() A b/a-b B b/a+b C a/a-b D a/a+b 化简 y-x/x^2-y-x/y^2的结果() A -x-y B y-x C x-y D x+y 计算ab^2/(ab)^2的结果() A b B a C 1 D b/1
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