4a²-b² 6a-3b

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用简便方法计算 (1)(3a-6b/a+b-(5a-6b/a-b)-(4a-5b/a+b)-(7a-8b/b-a) 第二

(3a-6b)/a+b-(5a-6b/a-b)-(4a-5b/a+b)-(7a-8b/b-a)=[(3a-6b)-(4a-5b)]/(a+b)-[(5a-6b)-(7a-8b)/(a-b)]=-(a+

当a+2b/2a-3b=3,求代数式4b+2a/9b-6a-4a-6b/3a+6b

4b+2a/9b-6a-4a-6b/3a+6b=—2(a+2b)/3(2a-3b)—2(2a-3b)/3(a+2b)因为a+2b/2a-3b=3所以—2(a+2b)/3(2a-3b)=—2/3乘以(a

3a^2b-{2a^2b+[9a^b-(6a^2b+4a^2)]-(3a^2b-8a^2)}=

3a^2b-{2a^2b+[9a^2b-(6a^2b+4a^2)]-(3a^2b-8a^2)}=3a^2b-2a^2b-[9a^2b-(6a^2b+4a^2)]+(3a^2b-8a^2)=a^2b-9

如果a-2b/a+2b=3,求a+2b/a-2b+3a-6b/4a+8b

如果a-2b/a+2b=3,a+2b/a-2b+3a-6b/4a+8b=1/3+3(a-2b)/4(a+2b)=1/3+3/4×3=1/3+9/4=4/12+27/12=31/12;很高兴为您解答,s

a+2b/2a-3b=3 求解4b+2a/9b-6a-4a-6b/3a+6b=?

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

1.(a-b)^2(b-a)^3(a-b)^-4

1.(a-b)^2(b-a)^3(a-b)^-4=(a-b)^2*(b-a)^3*1/(a-b)^4=(b-a)^2*(b-a)^3*1/(b-a)^4=(b-a)^5/(b-a)^4=b-a2.(-

计算:3a+4b/a-b+3b/b-a-4a/a-b

3a+4b/a-b+3b/b-a-4a/a-b=(3a+4b-3b-4a)/(a-b)=(b-a)/(a-b)=-1在右上角点击【评价】,然后就可以选择【满意,问题已经完美解决】了.

a-2b/a+2b=3,求2+2b/a-2b+3a-6b/4a+8b的值

a-2b/a+2b=3a-2b=3(a+2b)a-2b=3a+6b-2a=8ba=-4b所以,2+(2b/a)-2b+3a-(6b/4a)+8b=2+(2b/-4b)-2b+3(-4b)-(6b/-1

a+b分之3a-6b-a-b分之5a-6b-a+b分之4a-5b-b-a分之7a-8b

最终结果等于1.(3a-6b)/(a+b)-(4a-5b)/(a+b)-(5a-6b)/(a-b)-(7a-8b)/(b-a)=(3a-6b-4a+5b)/(a+b)-(5a-6b)/(a-b)+(7

(3a+2b)^2+(3a-2b)^2-(6a-4b)(3a-2b)=

(3a+2b)^2+(3a-2b)^2-(6a-4b)(3a-2b)=(3a+2b)^2+(3a-2b)^2-2*(3a-2b)(3a-2b)=(3a+2b)^2-(3a-2b)^2=(3a+2b+3

因式分解4a^2-b^2+6a-3b

4a^2-b^2+6a-3b=(4a^2-b^2)+(6a-3b)=((2a)^2-(b)^2)+(6a-3b)=(2a+b)(2a-b)+3(2a-b)=(2a+b+3)(2a-b)

[8(a+b)^6+4(a+b)^4+(-a-b)^3]÷[2(a+b)^3].

原式=[8(a+b)^6-4(a+b)^4-(a+b)^3]÷[2(a+b)^3]=4(a+b)^3-2(a+b)-1/2.

(a-2b)/(a+2b)=3,求(a+2b)/(a-2b)+(3a-6b)/(4a+8b)的解,

因为(a-2b)/(a+2b)=3所以(a+2b)/(a-2b)=1/3且(3a-6b)/(4a+8b)=3(a-2b)/4(a+2b)=(3/4)*3=9/4所以所求答案为31/12

2a²(b²-3b)-4b(b²-3a²-a²b)怎么解?

解题思路:括号外的单项式乘以括号内的每一项,去括号后,合并同类项解题过程:解:2a²(b²-3b)-4b(b²-3a²-a²b)=2a²b²-6a²b-4b³+12a²b+4a²b²=6a²b²+6a

3a-2b分之6a-4b

3a-2b分之6a-4b=(6a-4b)/(3a-2b)=2*(3a-2b)/(3a-2b)=2

(3a-6b)/(a+b) - (5a-6b)/(a-b) - (4a-5b)/(a+b) - (7a-8b)/(a-b

(3a-6b)/(a+b)-(5a-6b)/(a-b)-(4a-5b)/(a+b)-(7a-8b)/(a-b)=(3a-6b)/(a+b)-(4a-5b)/(a+b)-(5a-6b)/(a-b)-(7

计算(3a-2b)(9a*a+6ab+4b*b)-(3a+2b)(9a*a-6ab+4b*b)

(3a-2b)(3a+2b)(3a+2b)-(3a+2b)(3a-2b)(3a-2b)=(3a-2b)(3a+2b)4

(3a-6b/a+b)-(5a-6b/a-b)-(4a-5b/a+b)-(7a-8b/b-a)

化简的=(3a-6b-4a+5b)/(a+b)-(5a-6b-7a+8b)/(a-b)=(-a-b)/(a+b)-(-2a+2b)/(a-b)=-1-(-2)=1