x^2+12x+25=0
x*x+2x+x*x+10x+x*x+25+2x+x*x+1+1+16+x*x+4x*x+9-12x+16x*x+4-1
f(x)={x^2+x(x≤0),-x^2+x(x>0)
(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2
20%x+[25*(20%x)]+12=50%x+2
x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002
用适当方法解方程(x+6)²-9=0 x²-2x+1=25 4x²+12x+9=81 3x
解方程(x²+3x+2)(x²-2x-1)(x²-7x+12)+24=0
x^2+8x+12=0
解方程 25%X=200 X+35%X=540 X-78%=8.8 48%X-12%X=36 156%X-X=5.6 2
解方程:X-25%X=30 2X+30%X=9.2 75%X-45%X=12 X+120%X=33
x-25%x=30 2x+30%x=9.2 75%x-45%x=12 x+120%x=33 求解答、还求讲解
求解分式方程.(6x+12)/(x^2+4x+4)-(x^2-4)/(x^2-4x+4)+x^2/(x^2-4)=0