若x² px q乘以x²-2x-3-搜答案-智慧作业帮

2X乘以X等于多少

2倍X2ci的平方,答案是45.58

（2x-5）/(x-2)(x-3)-1/(x-3)=（2x-5）/(x-2)(x-3)-(x-2)/(x-2)(x-3)=（2x-5-x+2)/(x-2)(x-3)=（x-3)/(x-2)(x-3)=

x乘以x^4+x^2(x^3-1)-2x^3(x+1)^2=x^5+x^5-x^2-2x^3(x^2+2x+1)=x^5+x^5-x^2-2x^5-4x^4-2x^3=-4x^4-2x^3-x^2

3x^2-x=19x^4+12x^3-2x^2-7x+2005=3x^2×(3x^2-x)+5x×(3x^2-x)+(3x^2-x)-6x+2005=3x^2+5x+1-6x+2005=3x^2-x+

对.前提是x不等于y

x^6n+x^4n乘以x^5n=x^6n+x^(4n+5n)=x^6n+x^9n=(x^3n)^2+(x^3n)^3=2^2+2^3=4+8=12

(x-y)^3乘以（y-x）^2=(x-y)^3*(x-y)^2=(x-y)^(3+2)=(x-y)^5A

说明一下：“*”是乘号15*（3x-8）-4*（2x+3）=6*（4x-4）-4首先,化简,得（15*3x-15*8）-（4*2x+4*3）=6*4x-6*4-4去括号（记的变号）,得45x-120-

=2(x-3)/(x-2)²×1/(x+3)×(x+3)(x-2)/(x+3)=2(x-3)/(x-2)(x+3)=(2x-6)/(x²+x-6)感觉有一个你式子中的某一个+3应该

=2/2-X=(2X-6)/(X-2)^2乘以1/(X+3)乘以(X-2)(X-3)/(3-X)把那个式子分解了就好算了一消就都没了

（2x^3-x+6)乘以(3x^2+5x-2)=6x^5+10x^4-4x^3-3x^3-5x^2+2x+18x^2+30x-12=6x^5+10x^4-7x^3+13x^2+32x-12

2*0.2x-3*0.3x+5*0.4x=0.3*50.4x-0.9x+2x=1.51.5x=1.5x=1

X-15n+45=0再问：请写在纸上再答：再问：错了再答：?

4-4x+x^2分之2x-6除以（x+3)乘以3-x分之x^2+x-6=2(x-3)/(x-2)²×1/(x+3)×(x+3)(x-2)/(3-x)=-2/(x-2)

2X+1前面一个分解为（2x+1)(x+1)后面一个分解为（2x+1)(2x-3)

x+2≠0x≠-2x+4≠0x≠-4x+3≠0x≠-3x≠0故：若分式x+1/x+2除以x+4/x+3乘以1/2x有意义,则x的取值范围是x∈R且x≠-2x≠-4x≠-3x≠0

x²-4/x²-x-2乘以x²-x/x²+3x+2=（x+2)(x-2)/[(x-2)(x+1)]*x(x-1)/[(x+2)(x+1)]=x(x-1)/(x+

2x^3

1乘以2分之x+2乘以3分之x+.+2012乘以2013分之x=2012(1-1/2+1/2-1/3+……+1/2012-1/2013)x=2012(1-1/2013)x=20122012/2013x

4-4x+4x的平方分之2x-6除以(x-3)乘以3-x分之(x+3)乘以(x-2)=(2x-6)÷4÷(x-3)×(x+3)÷(3-x)×(x-2)=(x-3)÷2÷(x-3)×(x+3)÷(3-x