x^2-25＝0

若x^3+x^2+x+1=0,则x^-27+x^-26+x^-25+……+x^-1+1+x+……+x^26+x^27若x^3+x^2+x+1=0,则x^-27+x^-26+x^-25+……+x^-1+

(x²-1/x)-(x/x²-1)+2＝0求x(x²-1/x)-(x/x²-1)+2＝0求x(x²-1/x)-(x/x²-1)+2＝0求x&

x*x+2x+x*x+10x+x*x+25+2x+x*x+1+1+16+x*x+4x*x+9-12x+16x*x+4-16x=30x*x-7x-15求x,可以只要答案.如图,全是正方形,一个边长为1,

x-10x+25＝0x-10x+25＝0x-10x+25＝0（x一5）=0X=5

x²-2x+1＝0x等于?x²-2x+1＝0x等于?x²-2x+1＝0x等于?x＝1

(x-3)²+2x(x-3)＝0(x-3)²+2x(x-3)＝0(x-3)²+2x(x-3)＝03。x等于1或31或3

2x-1/x+3＝0求x2x-1/x+3＝0求x2x-1/x+3＝0求x 

50x^2+25x-8=0求x50x^2+25x-8=0求x50x^2+25x-8=0求xx²+x/2=4/25x²+x/2+1/16=4/25+1/16(x+1/4)²

2x＝25+x注意：2x＝25+x注意：2x＝25+x注意：2x＝25+x2x-x=25x=252x=25+x2x-x=25x=252x-x=25+x-xx=25由题目得2x-x=25所以x=252x

2x²+4x＝02x²+4x＝02x²+4x＝00-2

5-x/2x+4>＝05-x/2x+4>＝0 5-x/2x+4>＝0①{5-X≥0②{5-X≤02X+4≥02X+4≤0①解得②无解-2≤X≤5∴原不等式组的解集为-2≤X≤5

x^2-25x+24=0x^2-25x+24=0x^2-25x+24=0x^2-25x+24=0(x-1)(x-24)=0x1=1,x2=24

x^2+12x+25=0x^2+12x+25=0x^2+12x+25=0x^2+12x+25=0x^2+12x+36-11=0(x+6)^2=11x+6=±根号11x=-6±根号11

x^2-25x=0x^2-25x=0x^2-25x=0x(x-25)=0x=0,x=25x^2-25x=0x(x-25)=0x=0,x=25x（x-25）＝0x＝0或x＝25

X^2-10x+25=0X^2-10x+25=0X^2-10x+25=0X^2-10x+25=0（x-5)²=0x-5=0x=5X^2-10x+25=0(x-5)²=0x1=x2=

x^+2x=0x^-25=0x^+5x-1=0(x+1)^2=2x(x-1)^2x^+2x=0x^-25=0x^+5x-1=0(x+1)^2=2x(x-1)^2x^+2x=0x^-25=0x^+5x-

已知x^25x+1=0,求x^2+x^-2已知x^2×5x+1=0求x^2+x^-2已知x^25x+1=0,求x^2+x^-2已知x^2×5x+1=0求x^2+x^-2已知x^25x+1=0,求x^2

（1）2（n-1）²+n＝1(2)(2x+1)²-x²=0(3)x²-6x-19=0(4)5x(x-3)-(x-3)(x+1)=0(5)4(3x+1)²

（1）2（n-1）²+n＝1(2)(2x+1)²-x²=0(3)x²-6x-19=0(4)5x(x-3)-(x-3)(x+1)=0(5)4(3x+1)²

已知f（x）＝｛2x,x＜0x²,x≧｝若f（x）＝16,则x的值为.打错了。从发，f（x）＝｛2x,x＜0,x已知f（x）＝｛2x,x＜0x²,x≧｝若f（x）＝16,则x的值为