若2x2-x=1,则4x4-4x3+3x2-x+4=
1个回答
x=2X2-1=4-1=3;
将x=3代如计算式则4X4-4X3+3X2-3+4=16-12+6-3+4=11
相关问题
若x>0,则(2x^1/4 + 3^3/2)(2x^1/4 – 3^3/2) – 4x^-1/4(x^3/4 – x^1
若4x=3x-2,则4x-()=-2
若x=1/x,则(x^2-4x/x+3)/(4-x/x)*(-x+3/x^3)
x1+5x2+2x3-4x4=3 -3x1-2x2+3x3+4x4=-6 -x1+3x2-x3-4x4=-2 -2x1+
若3x2-4x-5=7,则x2-[4/3]x=______.
若X+1/X=3则X^2/X^4+X^2+1=____
若X+1/X=3则X^2/X^4+X^2+1=____
若1/x+x=3,则 X^2/(x^4+X^2+1)=?
若x^2+4x+1=0,则(x^4+19x^2+1)/(2x^3+19x^2+2x)=?
若(4-x)(3-x)=5,则(x-4)^2+(3-x)^2的值