作业帮2x+(14-x)=x+14
2x+(14-x)=x+14
(x^3)^()*x^2=x^14
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
已知x*x-5x=14,求(x-1)(2x-1)-(x+1)*(x+1)+1的值
解方程 x(x+1)(x²-2x-4)=0 x³-2x+1=0 x的4次方+8x³+14x
5x+2=-8 x=30 3x=5x-14 x
20+0.8x=x-14 112-4x=2x(80-4x)
(x-1)(2x-1)-(x+1)2+1,其中x²-5x=14,
1、14x(x+6)-6x=8x(2x+5)
已知x²-5x=14,求(x-1)(2x-1)-(x+1..
3/2(x-14)-2(x+1)=2x
2x^2+14x+49=169,求x.