(0.5x+2)+(15-1.5x)=1(计算过程、答案)

2x(x-1)-x(2x-5)=15 y=(3x^2-x√x+5√x-9)/√x 求导我算到4.5x^0.5-1+2x+4.5x^1.5 , 3X*X-2X+6=8,X=?3X*X-2X+6=8，X=？则代数式1.5X*X-X+1=? 我的.m函数如下：function F = myfun(x)F = [(2*x(1)+3*x(2)+x(3))^2*(x(1)+x(2))*(1-x(3))/((1-x(1)-x(2))*(2-0.5*x(1))^0.5*(1+3+1.5*x(1)+2*x(2))^1.5)-3.46e+11;(2*x(1)+3*x(2)+x(3))^3*(x(1)+x(2))*(1-x(3))/((1-x(1)-x(2))*(1-x(2)-x(3))^0.5*(1+3+1.5*x(1 (x+2)(x^2+5x-10)-(x+2)^2(x-1),其中x=1.5 (x+2)(x^2+5x-10)-(x+2)^2(x-1),其中x=1.5, 解方程(x-3/x)-(3-x/x+1)=5x-15/2x+2 x-2=(104-x)+2 6x-59=10x-75 (x+10)+(x-15)=280-x4（x-62)=x-38 60x-40=(60+20)*(x-5) 32x+32*0.5-25x+64x=24x+496-49x x+15=3*(109-x ) 5(3x-1.4)=2(6x-0.5) 3(x+0.9)=5(x-1.7) 13x-4(2x+5)=17(x-2)-4(2x-1) (13x+8)/3=5x-1x-60=2[(3561-x)+100]+1 (x+9)+12=2[(x-9)-1 1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550必须用解方程 先化简再求值先化简再求值：（x-x/x+1）(x+1/x^2+4x+4)(x^2-4/x^2-2x),其中x=-0.5 y=(x+3)(x+3-0.5x^2-x+1.5)*1/2 最大值 解方程:(x+10)+(x-15)=280-x x+15=3*(109-x) 5(3x-1.4)=2(6x-0.5) 3(x+0.9)=5(x-1.7) 13x-4(...解方程:(x+10)+(x-15)=280-xx+15=3*(109-x) 5(3x-1.4)=2(6x-0.5) 3(x+0.9)=5(x-1.7)13x-4(2x+5)=17(x-2)-4(2x-1) x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, (x+2)(x-1)+(x+3)(x+1)=x·x-1 求x (5x-4)(2x+5)(3x-6)(2x-4)=(2x-4)(2x+5)·0.5 求x 2(x+15)=x-10 4（x+7)=2(x-1) -7( x+1)=21 6(x-0.5)-x=12 .. 2(x+15)=x-10 4（x+7)=2(x-1) -7( x+1)=21 6(x-0.5)-x=12 .. 2x²-6x=5x-15(2x-1)(x+1)=(3x+1)(x+1)