a+2b/2a-3b=3 求解4b+2a/9b-6a-4a-6b/3a+6b=?
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a+2b/2a-3b=3 求解4b+2a/9b-6a-4a-6b/3a+6b=?
![a+2b/2a-3b=3 求解4b+2a/9b-6a-4a-6b/3a+6b=?](/uploads/image/z/3309829-61-9.jpg?t=a%2B2b%2F2a-3b%3D3+%E6%B1%82%E8%A7%A34b%2B2a%2F9b-6a-4a-6b%2F3a%2B6b%3D%3F)
答案是-20/9
因为(a+2b)/(2a-3b)=3
所以(2a-3b)/(a+2b)=1/3
原式=2(a+2b)/(-3)(2a-3b)-2(2a-3b)/3(a+2b)
=-2/3×3-2/3×1/3
=-20/9
因为(a+2b)/(2a-3b)=3
所以(2a-3b)/(a+2b)=1/3
原式=2(a+2b)/(-3)(2a-3b)-2(2a-3b)/3(a+2b)
=-2/3×3-2/3×1/3
=-20/9
a+2b/2a-3b=3 求解4b+2a/9b-6a-4a-6b/3a+6b=?
当a+2b/2a-3b=3,求代数式4b+2a/9b-6a-4a-6b/3a+6b
3a^2b-{2a^2b+[9a^b-(6a^2b+4a^2)]-(3a^2b-8a^2)}=
先化简,再求值:(2a-b)^2-(2a+b)(a-b)-3(a-3b)(a+3b),其中|a-1|+b^2=6b-9
(a+2b)(2a+4b)(3a+6b)(4a+8b)
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a-2b/a+2b=3,求2+2b/a-2b+3a-6b/4a+8b的值
计算(3a-2b)(9a*a+6ab+4b*b)-(3a+2b)(9a*a-6ab+4b*b)
(3a+2b)^2+(3a-2b)^2-(6a-4b)(3a-2b)=
A=B+B+B+B+B+B+B+B+B+B+B+B+B+B+B A-B×3=C C+2×7+2=1