(X^2-Y^2)除以(X+Y)等于几?

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(X^2-Y^2)除以(X+Y)等于几?(X^2-Y^2)除以(X+Y)等于几?(X^2-Y^2)除以(X+Y)等于几?(x^2-y^2)/(x+y)=(x+y)(x-y)/(x+y)=x-yx-y

(X^2-Y^2)除以(X+Y)等于几?
(X^2-Y^2)除以(X+Y)等于几?

(X^2-Y^2)除以(X+Y)等于几?
(x^2-y^2)/(x+y)
=(x+y)(x-y)/(x+y)
=x-y

x-y