计算 x-(4x-3y)+(2y-x) 3(a-b)-5(a-2b+1) (7a-2b)-[6a-(5b-2c)]+2c
A.A+(4X+3Y)B.A+(4X+6Y) C.A+2(
计算:(1)(a-2b+c)(a+2b-c)-(a+2b+c)2;(2)(x+y)4(x-y)4;(3)(a+b+c)(
计算:(1) (2x-3y)+(5x+4y) (2) (8a-7b)-(4a-5b)
分解因式1.x^2+y^2+2x+6y+10 2.(1-y)^3+4(y-x) 3.(a-c)^2-4(a-b)(b-c
计算:(-2a^2b)(2/3ab^3)(-6b^2c^3) (x+y)(x-y)-(x-2y)(x+2y) (3x-2
解二元一次方程(1)a-b+c=4 a+b+c=3 2a+b+c=3(2)x-y-z=5 y-z-x=1 z-x-y=1
因式分解 x^2-5x-6 y^2-x-12 (a+b)^3-(a+b) 6a^2b^2-18ab^2c+12ab^2c
因式分解2x²y-xy-3y (-a+b)+c²(a-b)
化简:x+(5x-3y)-(x-2y),化简与求值:1/3a-【1/2a-4b-6c]+3(2b-2c),其中a=6,b
#include main() { int a=5,b=6,c=1,x=2,y=3,z=4; c=(a=c>x)&&(b
解方程组2x/a+3y/b-4z/c=1,4x/a+2y/b-3z/c=3,3x/a+4y/b-2z/c=5
main() { int a,b,c,d,e; int x=5,y=6; a=1,b=2; c=(a+x)>(b+y);