Y(4a-7b)(4a+7b)-2a(8a-5)计算
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Y(4a-7b)(4a+7b)-2a(8a-5)计算
8a+2b+(5a-b)① (2x-3y)-(5x+4y)② (8a-7b)-2(4a-5b)
(3a+4b)(7a-8b)+(11a+2b)(8a-7a)
提取公因式计算题 急1.(b-a)2次+a(a-b)+b(b-a) 2.(3a-4b)(7a-8b)+(11a-12b)(8b-7a)4.x(b+c-d)-y(d-b-c)-c-b+d 5.x平方+x+4分之一6.8a-4a平方-4
1.-10x^2y-5xy^2+15xy;2.(2a+b)(2a-3b)+a(2a+b);3.5a^3b(a-b)^3-10a^4b^3(b-a)^24.(3a-4b)(7a-8b)+(11a-12b)(8b-7a);5.x(b+c-d)-y(d-b-c)-c-b+d.求快!在23:15之前6.(x+3)^2-(x+3)
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
(3a-6b)/(a+b) - (5a-6b)/(a-b) - (4a-5b)/(a+b) - (7a-8b)/(a-b) 快
(3a-6b/a+b)-(5a-6b/a-b)-(4a-5b/a+b)-(7a-8b/b-a)
1/(a-b)-1/(a+b)-(2b)/(a^2+b^2)-(4b^3)/(a^4+b^4)+(8b^7)/(b^8-a^8)快
1/a-b-1/a+b-2b/a^2+b^2-4b^3/a^4+b^4+8b^7/b^2-a^2
把(a+b)和(x+y)各看成一项,合并同类项:(1)4(a+b)+2(a+b)-(a+b); (2)3(x-y)^2-7(x+y)+8(x-y)^2+6(x+y
把(a+b)和(x+y)各看成一项,对下列各式合并同类项:① 4(a+b)+2(a+b)-(a+b) ② 3(x+y)^2-7(x+y)+8(x+y)^2+6(x+y)
4把(a+b)(x+y)看成整体化简 (a+b)+2(a+b)-(a+b) 3(x+y)²-7(x+y)+8(x+y)²+6(x+y
2a-{7b+[4a-7b-(2a-6a-4b)]-3a
(3a-4b)(7a-8b)+(11a-12b)(8b-7a)
计算:(1) (2x-3y)+(5x+4y) (2) (8a-7b)-(4a-5b)
7(a-b)²+8(a+b)²-9(a-b)²-4(a+b)²
a+2a= 8b-b= y+9y= x+7x-4x=