作业帮(2a+3b)(3a-2b)-(4a-3b)^2+(a-b)(-a-b)快
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(2a+3b)(3a-2b)-(4a-3b)^2+(a-b)(-a-b)快
(2a+3b)(3a-2b)-(4a-3b)^2+(a-b)(-a-b)
快
(2a+3b)(3a-2b)-(4a-3b)^2+(a-b)(-a-b)快
原式=6a²-4ab+9ab-6b²-(16a²-24ab+9b²)-a²-ab-ab-b²
=6a²-4ab+9ab-6b²-16a²+24ab-9b²-a²-ab-ab-b²
=27ab-11a²+2b²
(2a+3b)(3a-2b)-(4a-3b)^2+(a-b)(-a-b)
=6a²+5ab-6b²-16a²+24ab-9b²+b²-a²
=-11a²+29ab-14b²
=-(11a²-29ab+14b²)
=-(11a-7b)(a-2b)
2(a+b)-[4(a+b)-3(a+b)]一[5(a-b)+(a-b)]过程
5(a*a*b-3*a*a*b)-2*(a*a*b-7*a*b*b)
(a+2b)(a-2b)+(a-b)(a+b)-2(a-3b)(a-b)
2a(a-b)+4a(2a+3b)
(2/3a)-[2/(a+b)]{[(a+b)/3a]-a-b}÷[(a-b)/b]
(2/3a)-[2/(a+b)]{[(a+b)/3a]-a-b}÷[(a-b)/a]
化简:[2/3a - 2/(a+b) * (a+b/3a - a - b)] / (a-b)/a
计算：(4a-b)^2-[8a*(a-b)-(3a-b)*(3a+b)]
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a+a-a+2a-3a-2b+3b-5b+3b-4b-5b
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(a-b)^4+a^2(b-a)^2-2a(b-a)^3 .
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(a-2b)(-2b-a)-(3a+4b)(-3a+4b)
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