x=0:10; y=2*x^2+3*x+1; plot(x,y) 提示y=2*x^2+3*x+1;这一行有错误

{4x-3y-10=0 3x-2y=0,{3x-4(x-y)=2 2x-3y=1,{2(x+y)-(x-y)=3 (x+y)-2(x-y)=1 3^x+2x=y,x 5(x+y)-2x=0 3x-10(x+y)=2 x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 若x-y不等于0,2x-3y=0,则分式(10x-11y)/(x-y)的值是（）?(10x-11y)/(x-y) =[(8x-8y)+(2x-3y)]/(x-y) =8为什么8X-8Y=8？(10x-11y)/(x-y)=[(8x-8y)+(2x-3y)]/(x-y)=8+(2x-3y)]/(x-y)=8+0=8 先化简,再求值 [2/3x - 2/x+y（x+y/3x -x-y）]*x/x-y,其中5x+3y=0 先化简,再求值:[3x-2/x+y(x+y/3x-x-y)]/(x-y/x),其中5x+3y=0 若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7 已知x-y-3绝对值+(2x+2y+10)的平方=0,则(x+y)(x-Y)= y=x(3-2x) (0 (x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)= (x+y)(x-y)+(x-y)平方-(x-y)(3x-y) 其中x=-2 y=3分之一 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 2x-3y=10 x+y=0 x=?y=? {2x+y=10 {x-y+z=4 {3x-y-z=0 (x+y-5)+|3y-2x+10|=0,求 x,y的值 (x+y)(2x-3y)=? 求y=(x^2)+2x(x≥0) y=-x+2x(x