计算(1)a-1/3y(a+b)+1/2(a-b)-1/6(a-2b) (2)x(9x-5)-(3x+1)(3x-1)(3)4xy+(x-2y)^2+(x+3y)(3y-x)
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/16 10:53:49
计算(1)a-1/3y(a+b)+1/2(a-b)-1/6(a-2b) (2)x(9x-5)-(3x+1)(3x-1)(3)4xy+(x-2y)^2+(x+3y)(3y-x)
计算(1)a-1/3y(a+b)+1/2(a-b)-1/6(a-2b) (2)x(9x-5)-(3x+1)(3x-1)
(3)4xy+(x-2y)^2+(x+3y)(3y-x)
计算(1)a-1/3y(a+b)+1/2(a-b)-1/6(a-2b) (2)x(9x-5)-(3x+1)(3x-1)(3)4xy+(x-2y)^2+(x+3y)(3y-x)
(1)a-1/3 (a+b)+1/2(a-b)-1/6(a-2b) 删除了一个y
=a-a/3-b/3+a/2-b/2-a/6+b/3
=a-b/2
(2)x(9x-5)-(3x+1)(3x-1)
=9x²-5x-9x²+1
=-5x+1
(3)4xy+(x-2y)^2+(x+3y)(3y-x)
=4xy+x²-4xy+4y²+9y²-x²
=13y²
计算:(1) (2x-3y)+(5x+4y) (2) (8a-7b)-(4a-5b)
数学分式和2次根式的题目计算(b/a-a/b)÷a/a+b的结果() A b/a-b B b/a+b C a/a-b D a/a+b 化简 y-x/x^2-y-x/y^2的结果() A -x-y B y-x C x-y D x+y 计算ab^2/(ab)^2的结果() A b B a C 1 D b/1
分式和2次根式的数学题目计算(b/a-a/b)÷a/a+b的结果() A b/a-b B b/a+b C a/a-b D a/a+b 化简 y-x/x^2-y-x/y^2的结果() A -x-y B y-x C x-y D x+y 计算ab^2/(ab)^2的结果() A b B a C 1 D b/1提问者:luoyingyu12 -
计算:(1)(3y-1)(2y+3)-(6y-5)(y-4)(2)(a-b+1)(a+b-1)
-6x^2y*(-a-b)^3*1/3xy^2*(b+a)^2计算
计算:1、(2a-3b)(2a+3b)(-4a²-9b²) 2、(x-2y+3)(x+2y-3)
求平方差公式计算 (a+3b)(a-3b) (1-5y)(1+5y) (3+2a)(-3+2a) (4x-5y)(4x+5y) (2/3x-7y)(2/3+7y)求平方差公式计算(a+3b)(a-3b)(1-5y)(1+5y)(3+2a)(-3+2a)(4x-5y)(4x+5y) (2/3x -7y)(2/3+7y)
用乘法公式计算(1)(3a-b)(b+3a)-(2b+a)(-2b-a) (2)(-x-2y)(x+2y)
计算:(a-b+2c-1)(a-b-2c+1) (x-5y)(-x-5y)-(-x+5y)² (运用公式简便计算!)
(a+b+1)(2a-b)计算
计算(a/a-b+b/b-a)/(1/a+b)的结果 (1)a-b (2)ab (3)a^2-b^2 (4)a+b
计算 [(2/3x)-(2/x+y)(x+y/3x-x-y)]÷(x-y/x) [1/(a+b)²-1/(a-b)²]÷(1/a+b - 1/a-b)一:[(2/3x)-(2/x+y)(x+y/3x-x-y)]÷(x-y/x) 二:[1/(a+b)²-1/(a-b)²]÷(1/a+b - 1/a-b)
计算:(a-b+4ab/a-b)(a+b-4ab/a+b)计算:1.(a-b+4ab/a-b)(a+b-4ab/a+b)2.(a^-2)^-3 × (bc^-1)^33.(3x^3y^2z^-1)^-2 × (5xy^-2z^3)^2
阅读下列程序,并指出当a=2,b=-5时的计算结果:(1)a=input(a=)b=input(b=) (2) a=input(a=)b=input(b=) (3) a=input(a=)b=input(b=)x=a+b a=a+b a=a+by=a-b b=a-b b=a-ba=(x+y)/2 a=(a+b)/2 a=(a-b)/2b=(x-y)/2 b=(a-b)/2 b=(a+b)/2除
计算 1、(a-b)^3*(a-b)^4*(b-a)^3 2、y^(m+2)*y*y^(m-1)+y^(2m+2) 3、(n-m)^3*(m-n)^2-(m-n)^5
计算:-1^2006-8(3.14-2)^0+(-1/2)^-2*2(3x-2y)^2-(y+3y)(3x-y)分解因式:(1) x^3-4x (2) y^3-4y^2+4y诺a-b=2,3a+2b=3,则3a(a-b)+2b(a-b)=___________
利用完全平方公式计算如下题(x+y+1)(x-y+1)(a-2b+3c)2
下列公式中,计算正确的是( )A.2(b+c)/a+3(b+c)=a+2/3 B.a+b/a^2+b^2=2/a+bC.(a-b)^2/(a+b)^2=1 D.x-y/2xy-x^2-y^2=1/y-x