25分之X方—16分之Y方

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25分之X方—16分之Y方25分之X方—16分之Y方25分之X方—16分之Y方x^2/25-y^2/16=(x/5+y/4)(x/5-y/4)x^2/25-y^2/16=(x/5+y/4)(x/5-y

25分之X方—16分之Y方
25分之X方—16分之Y方

25分之X方—16分之Y方
x^2/25-y^2/16
=(x/5+y/4)(x/5-y/4)

x^2/25-y^2/16 =(x/5+y/4)(x/5-y/4) x^2/25-y^2/16 =(x/5+y/4)(x/5-y/4) x^2/25-y^2/16 =(x/5+y/4)(x/5-y/4)