原算式有錯,9a平方應(yīng)是9b平方;否則此算式?jīng)]什么意義,代入a、b值算就是了.
解得a=3,b=1,而a2-6ab+9b2可以分解為(a-3b)(a-3b),所以其值為-1/a,即-1/3.
【a²-6ab+9a²/a²-2ab 】/【(5b²/a-2b)-a-2b】-1/a a+b=4 a-b=2
【a²-6ab+9a²/a²-2ab 】/【(5b²/a-2b)-a-2b】-1/a a+b=4 a-b=2
【a²-6ab+9a²/a²-2ab 】/【(5b²/a-2b)-a-2b】-1/a的值為多少
【a²-6ab+9a²/a²-2ab 】/【(5b²/a-2b)-a-2b】-1/a的值為多少
數(shù)學(xué)人氣:837 ℃時間:2020-06-22 04:17:19
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