-2(x-5)=8-x/2怎样做大神们帮帮忙
f(x+1)=x^2+2x+5,求f(x)大神们帮帮忙
x 平方+8x+12怎么做?大神们帮帮忙
X/2-5X+11/6=1+2X-4/3大神们帮帮忙
x除以2等于x减4怎么做?大神们帮帮忙
求导y=(x+1)(x+2)(x+3)(x+4)的导数大神们帮帮忙
x+3x=2*(x+300)怎么解大神们帮帮忙
解方程组2/(X+3)+6/(X-9)=1/(X-3)大神们帮帮忙
(2x-3)(2x-3)-5(2x-3)+6=0大神们帮帮忙
(x-2)(x-2)=4x-8用因式分解解方程大神们帮帮忙
已知方程2X-3Y=5大神们帮帮忙
求Y=2X+4X-7/X+2X+3的值域大神们帮帮忙
2(x+y)-3(x-y) =1 6(x+y)+7(x-y)=51大神们帮帮忙