3(a-b)-5(a-2b+1) (7a-2b)-[6a-(5b-2c)]+2cRT,3(a-b)-5(a-2b+1) (7a-2b)-[6a-(5b-2c)]+2c
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3(a-b)-5(a-2b+1) (7a-2b)-[6a-(5b-2c)]+2cRT,3(a-b)-5(a-2b+1) (7a-2b)-[6a-(5b-2c)]+2c
3(a-b)-5(a-2b+1) (7a-2b)-[6a-(5b-2c)]+2c
RT,
3(a-b)-5(a-2b+1)
(7a-2b)-[6a-(5b-2c)]+2c
3(a-b)-5(a-2b+1) (7a-2b)-[6a-(5b-2c)]+2cRT,3(a-b)-5(a-2b+1) (7a-2b)-[6a-(5b-2c)]+2c
3(a-b)-5(a-2b+1)
=3a-3b-5a+10b-5
=3a-5a+10b-3b-5
=-2a+7b-5
(7a-2b)-[6a-(5b-2c)]+2c
=7a-2b-6a+(5b-2c)+2c
=7a-2b-6a+5b-2c+2c
=7a-6a+5b-2b
=a+3b
5(a*a*b-3*a*a*b)-2*(a*a*b-7*a*b*b)
因式分解:(a+1)(a+3)(a+5)(a+7)+15 a(a-b+2)-6b(b+1)(a+1)(a+3)(a+5)(a+7)+15a(a-b+2)-6b(b+1)
5(a+b)-3(a-b)=2 2(a+b)+5(a-b)=7
(3a^2*b-7a*b^2-a^2*b^2)*5a*b化简
化简:7(a-b-c)-5(a+b-c)+3(a-b-c)+(a+b-2)
2a-3(b-5a)-7(a-2b)
2a-3(5a-b)+7(a+2b)
2(a+b)-[4(a+b)-3(a+b)]一[5(a-b)+(a-b)]过程
5(a-b)^-3(a-b)^2-7(a-b)-(a-b)^2+7(a-b)合并同类项
(a-2b)(a+2b)-(a-5b)(a+3b),当a=-1,b=1
5a-(-2a+3-b)+2b-1 化简:7-[5-﹙3a-2b﹚+a]+a
等式:(a+b)^0=1 (a+b)^1=a+b (a+b)^2(a+b)^0=1(a+b)^1=a+b(a+b)^2=a^2+2ab+b^2(a+b)^3=a^3+3a^2b+3ab^2+b^3问:(a+b)^4=?(a+b)^5=?``````` (a+b)^9=?
初二分式的加减法2a-b-c/(a-b)(a-c)+ 2b-c-a/(b-c)(b-a)+ 2c-b-a/(c-b)(c-a)3a-6b/a+b- 5a-6b/a-b- 4a-5b/a+b+ 7a-8b/b-a注:有空格的地方是下一个分式
计算(5a-3b)^2+(a+b)(a-b)
2a+b/3a+5b 求a/b
判断下列各式是否正确:(1)|-a|=|a|.(2)-|a|=|-a|.(3)a分之|a|=|a|分之a.(4)若|a|=|b|,则a=b.(5)若a=b,则|a|=|b|.(6)若|a|>|b|,则a>b.(7)若a>b,则|a|大于|b|.
[(a+2b)(a-2b)-(2a-b)²+(3a-b)(3a-5b)]÷2a其中 a=-1,b=2
集合A{a+2,(a+1)^2,a^2+3a+3} B{a+b,1,a-b+5} 若A=B,求a,bSD