10/x+15x=1,x²+3x=180,这些都怎么算?
(25/X)X(30/X)= 15/X怎么算
X+180=3X怎么算
(2x+1)²-(x+3)(3-x)=6x怎么简便算?
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
3.5x+0.5x=12.8 x-0.5x=10.5 0.8x+4=7.2 这些怎么算?
这些解方程:x-6=15%x12 x-10%x=18 40%x+1/5x=15 25%x-5=60%x 5 3x+20%
方程两边都有x怎么解原题:4x+1=5x-3
(x+5)²-(x-2)(x-3) =x²+10x+25-(x²-5x+6) *5x怎么来
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
证明:设f(x)=(x-1)(x-3)(x-4)(x-6)+10,无论x取什么值,f(x)的值都大于0
7x-3(2/3x+1/5x)-(x+2/5x)+2x,=5x怎么求出
已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值