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2019-11-29 · 知道合伙人教育行家
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3次根号[(x+1)^2*(x-1)^4]
=3次根号[(x+1)^3*(x-1)^3*(x-1)/(x+1)]
=(x+1)(x-1)*3次根号[(x-1)/(x+1)]
=(x^2-1)*3次根号[(x-1)/(x+1)]
=3次根号[(x+1)^3*(x-1)^3*(x-1)/(x+1)]
=(x+1)(x-1)*3次根号[(x-1)/(x+1)]
=(x^2-1)*3次根号[(x-1)/(x+1)]
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(x-1)^4
=[(x+1)-2](x-1)^3
=(x+1)(x-1)^3 - 2(x-1)^3
(x+1)^2 . (x-1)^4
= (x+1)^2 . [ (x+1)(x-1)^3 - 2(x-1)^3 ]
= (x^2 -1)^3 - 2(x+1)^2. (x-1)^3
= (x^2 -1)^3 - 2(x^2-1)^3 /(x+1)
=(x^2-1)^3 . [1 - 2/(x+1) ]
=(x^2-1)^3 . [(x-1)/(x+1) ]
[ (x+1)^2 . (x-1)^4] ^(1/3)
=(x^2-1) . [(x-1)/(x+1) ]^(1/3)
=[(x+1)-2](x-1)^3
=(x+1)(x-1)^3 - 2(x-1)^3
(x+1)^2 . (x-1)^4
= (x+1)^2 . [ (x+1)(x-1)^3 - 2(x-1)^3 ]
= (x^2 -1)^3 - 2(x+1)^2. (x-1)^3
= (x^2 -1)^3 - 2(x^2-1)^3 /(x+1)
=(x^2-1)^3 . [1 - 2/(x+1) ]
=(x^2-1)^3 . [(x-1)/(x+1) ]
[ (x+1)^2 . (x-1)^4] ^(1/3)
=(x^2-1) . [(x-1)/(x+1) ]^(1/3)
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