18X方-277X 36=0怎么解-搜答案-百度作业网

y=|4-x²|/(4-x²)-xx>2或x

x方+3x-1=0两边乘以xx的3次方+3x²-x=0x的三次方+5x方+5x+18=x-3x²+5x²+5x+18=2x²+6x+18=2（x²+3

答：x^2-x-1=0显然x不为0,两边同除以x得：x-1-1/x=0x-1/x=1两边平方得：x^2-2+1/x^2=1x^2+1/x^2=3

(x²-2)(x²+1)=0x²+1=0无解x²=2x=±√2

1）3.5x0.25+360x0.25+0.25x36.5=0.25x(3.5+360+36.5)=100.2)(7.25x0.4+2.75x0.4）/0.1=0.4x(7.25+2.75)/0.2=

6x^2-7x+1=0(6x-1)(x-1)=0x1=1/6;x2=15x方-18=9x变为5x^2-9x-18=0(5x+6)(x-3)=0x1=-6/5;x2=34x^2-3x=52变为4x^2-

8x³=-27x³=-27/8x=-3/2

x方-5x+1=0两边除以x得∴x-5+1/x=0x+1/x=5两边平方得x²+2+1/x²=25x²+1/x²=23

X²+2009²X+2008×2010=0△=2009^4-4×2008×2010∴√△=4036079∴X1=(-2009²-4036079)/2=-4036080X2

(1)6x^2-7x+1=0(x-1)(6x-1)=0所以x1=1,x2=1/6(2)5x^2-18=9x5x^2-9x-18=0(5x+6)(x-3)=0所以x1=-6/5,x2=3(3)4x^2-

(x-1)(x-12)=0　x=1或12（5x+2)(x-3)=0　　x=3或-2/5要给分哦

x方-5x-14=0怎么解

X^2-5X-14=0(X-7)(X+2)=0X1=7X2=-2

18×36+82×36=36×(18+82)=36×100=3600(4+40)×25=4×25+40×25=100+1000=110024×59+24=24×(59+1)=24×60=144056×

25x的二次方-36=025X^2=36X^2=36/25所以,X=+-6/5（2x+1）的二次方=四分之九(*2X+1)^2=4/92X+1=+-2/3所以,2X+1=2/3或2X+1=-2/32X

80²-(100-x)²=60²-x²80²-60²=(100-x)²-x²(80+60)(80-60)=(100-x+

x²+x+1=0x+1+1/x=0x+1/x=-1两边平方得x²+2+1/x²=1x²+1/x²=-1两边平方得x^4+2+1/x^4=1x^4+1/

1公尺=1米1公分=1厘米56公分x36公分x23公分=46368CM补充：是的,CM（厘米）就是公分的意思,一样的.

0.5x0.5的意义：题中给的是边坡中截面面积,边坡1:0.5,指边坡中h/b=1:0.5,因此,0.5x4.7=b,由于是中截面,即宽为底边的一半,所以要再乘以0.5.挖基础土方：清单：18*36*

0=x^4+x^2+1=x^4+2x^2+1-x^2=(x^2+1)^2-x^2=(x^2+1+x)(x^2+1-x),0=x^2+x+1,Delta=1-4=-3.x(1)=[-1+(-3)^(1/