ab-{2ab-2[3a²b-(4ab²+0.5ab)-6a²b]}-3ab²
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ab-{2ab-2[3a²b-(4ab²+0.5ab)-6a²b]}-3ab² X=三分之二
a=-1 b=3
抱歉看错了
还有一题哈
(xy减去三分之二y减去三分之二)减去(二分之一x 减去二分之一xy+1)
X=三分之二
a=-1 b=3
抱歉看错了
还有一题哈
(xy减去三分之二y减去三分之二)减去(二分之一x 减去二分之一xy+1)
X=三分之二
![ab-{2ab-2[3a²b-(4ab²+0.5ab)-6a²b]}-3ab²](/uploads/image/z/18197448-24-8.jpg?t=ab-%7B2ab-2%5B3a%26%23178%3Bb-%284ab%26%23178%3B%2B0.5ab%29-6a%26%23178%3Bb%5D%7D-3ab%26%23178%3B)
ab-{2ab-2[3a²b-(4ab²+0.5ab)-6a²b]}-3ab²
=ab-[2ab-2(3a²b-4ab²-0.5ab-6a²b)]-3ab²
=ab-[2ab-2(3a²b-10ab²-0.5ab)]-3ab²
=ab-(2ab-6a²b+2ab²+ab)-3ab²
=ab-(3ab-6a²b+2ab²)-3ab²
=ab-3ab+6a²b-2ab²-3ab²
=-2ab+6a²b-5ab²
=ab-[2ab-2(3a²b-4ab²-0.5ab-6a²b)]-3ab²
=ab-[2ab-2(3a²b-10ab²-0.5ab)]-3ab²
=ab-(2ab-6a²b+2ab²+ab)-3ab²
=ab-(3ab-6a²b+2ab²)-3ab²
=ab-3ab+6a²b-2ab²-3ab²
=-2ab+6a²b-5ab²
已知ab²=6,求ab(a^2b^5-ab^3-b)的值
化简 3a²-[2ab-2(ab-3/2a²b)+ab]+4ab²
3a²b+ab²-2a²b²-3ab²-3a²b+4ab
(9a²-6ab+b²)/(3a²-ab),其中b/a=2
a³+a²b-(4a²b+3ab²)+b³+6ab²+2b&
化简求值:3a²b-[2ab²-2(-a²b+4ab²)]-5ab²,
a^2b-ab+2ab^2-5a^b-4ab+3ab^2化简快
(6a²-2a²)-(-a²+2ab+b²)-(a²-4ab+3b
分解因式 :3ab²+6a²b+ab -4a³b³+6a²b-2ab&
3ab+3b²/b(a²+2ab+b²) ×a²-b²/a-b ÷b/
已知a² + ab=3,b²+ ab=7,求a²-ab-2b²的值
已知a²+ab=3,b²+ab=7,试求a²-ab-2b²