5x+x=14

1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550 用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+. 已知x*x-5x=14,求(x-1)(2x-1)-(x+1)*(x+1)+1的值 x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x 5x+2=-8 x=30 3x=5x-14 x 1、14x(x+6)-6x=8x(2x+5) 已知x²-5x=14,求(x-1)(2x-1)-(x+1.. (x-1)(2x-1)-(x+1)2+1,其中x²-5x=14, x方-5x=14,x=? 4x+5x+14=42-2(x+3) 5x-2(7x+1)=14x x³-5x²-14x=?因式分解