已知x=2011,则|4x2-5x+9|-4|x2+2x+2|+3x+7=______.
已知x=2011,则|4x2-5x+9|-4|x2+2x+2|+3x+7=______.
已知x2+4x-4=0,则3x2+12x-5=______.
已知x2+4x+y2-2y+5=0,则x2+y2=______.
已知集合M={x|x2-2x>0},N={x|x2-4x+3
已知(x2+2x-3)0=x2-3x+3,则x=______.
已知x2+x-1=0,则3x2+3x-9=______.
比x2+4x+3少5x2-2x+7的多项式是______.
解方程:1/x2+x +1/x2+3x+2 +1/x2+5x+6 +1/x2+7x+12 +1/x2+9x+20=5/x
若x2+3x-2=0,则x3+5x2+4x+18=______.
已知x/﹙x2-3x+1﹚=2,则x2/x的4次方+x2+1=
已知x2+x-1=0,则x3-2x+4的值为______.
1/(x2+3x+2)+1/(x2+5x+6)+1/(x2+7x+12)=1/(x+4)