计算:(a+2)(3-a)+(2x+y+z)(2x-y-z)
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/27 20:10:17
计算:(a+2)(3-a)+(2x+y+z)(2x-y-z)计算:(a+2)(3-a)+(2x+y+z)(2x-y-z)计算:(a+2)(3-a)+(2x+y+z)(2x-y-z)解(a+2)(3-a
计算:(a+2)(3-a)+(2x+y+z)(2x-y-z)
计算:(a+2)(3-a)+(2x+y+z)(2x-y-z)
计算:(a+2)(3-a)+(2x+y+z)(2x-y-z)
解
(a+2)(3-a)+(2x+y+z)(2x-y-z)
=(3a-a²+6-2a)+[2x+(y+z)][2x-(y+z)]
=-a²+a+6+(2x)²-(y+z)²
=-a²+a+6+4x²-y²-z²-2yz
1.计算(a^2+a+1)(a^2-a+1) 2.计算(x-y)(x+y)+(3x-2y)(2x+y)-x(6x-y)
计算:(a+2)(3-a)+(2x+y+z)(2x-y-z)
计算:(x-3y)(5x-2y)还有(2a-3)(4a-4)
计算下列分解因式:(2a+b)(2a-3b)-3a(2a+b) x(x+y)(x-y)-x(x+y)2次方
计算 1.[(a+b)^2-(a+b)(a-b)]÷(-b) 2.[(x+y)(2x+y)+(x+y)(x-y)]÷3x
[(x+2y)^2-(-x-2y)(-x+2y)+2y(x-2y)]/2y计算-2a^2b-a^3-ab^2分解因式
(1)计算:a-(a^2)/(a+1)-1 (2)计算:3x/(x-4y)+(x+y)/(4y-x)-7y/(x-4y)(3)计算:x(2-1/x)+x/x^2-2x*(x^2-4)(4)计算:(x-3)/(2x-4)÷(5/x-2--2)(5)计算:m/m+3-6/9-m^2÷2/m-3(6)计算:(3a/a-3-a/a+3)*a^2-9/a
计算(1)x/x+y-x/x-y (2)a+2+4/a+2 (3)x^2-y^2/xy÷(x+y)
a*b=3a-2b若xy是有理数试计算{(x+y)*(x-y)}*2a
计算:(-a)^2(2-3ab) (x+2y)(2x-y)
(-a)^2(2-3ab) ,(x+2y)(2x-y)只要计算.
对于有理数a,b,定义:a*b=3a-2b,若x,y均为有理数,试计算[(x+y)*(x-y)]*2x
已知:a=7,x=2.5,y=4.7(a整型,x,y浮点),计算算术表达式x+a%3*(int)(x+y)%2/4的值.
利用乘法公式计算 (3a+2)^2-(2a-1)^2 (x-y)(x+y)-(2x-y)^2 [(x+2)(x-2)]^2 (a+3)(a-3)(a^2+9)(3a+2)^2-(2a-1)^2(x-y)(x+y)-(2x-y)^2 [(x+2)(x-2)]^2(a+3)(a-3)(a^2+9)
计算:(2a-5b)(2a^2-3ab+b^2) (3x+2y)(2x+3y)-(x-3y)(3x+4y)
(1)已知(x-y+3)^2+√2-y=0,试求x+y的值(2)计算:(a+3)(a-1)+a(a-2)
计算:(3x+2y)²-(3x-2y)² (2a+b-c)(2a-b-c)
定义新运算x*y=x-2xy+3y,试计算2a*b-(-2a)*(-3b)