(4x-9y^(-1))/(2x^(1/2)+3y(-1/2))等于?SORRY 应该是(4x-9y^(-1))/(2x^(1/2)+3y^(-1/2))
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(4x-9y^(-1))/(2x^(1/2)+3y(-1/2))等于?SORRY应该是(4x-9y^(-1))/(2x^(1/2)+3y^(-1/2))(4x-9y^(-1))/(2x^(1/2)+3
(4x-9y^(-1))/(2x^(1/2)+3y(-1/2))等于?SORRY 应该是(4x-9y^(-1))/(2x^(1/2)+3y^(-1/2))
(4x-9y^(-1))/(2x^(1/2)+3y(-1/2))等于?
SORRY 应该是(4x-9y^(-1))/(2x^(1/2)+3y^(-1/2))
(4x-9y^(-1))/(2x^(1/2)+3y(-1/2))等于?SORRY 应该是(4x-9y^(-1))/(2x^(1/2)+3y^(-1/2))
[4x-9y^(-1)]/[2x^(1/2)+3y(-1/2)]
=[2x^(1/2)+3y(-1/2)][2x^(1/2)-3y(-1/2)]/[2x^(1/2)+3y(-1/2)]
=2x^(1/2)-3y(-1/2)
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