1.(x+y)(x-y)(x^2+y^2)=( )2.若x^2+mx+1/4 是一个完全平方式,则m的值为( )3.12x^7y^6z^5÷( )=4x^3y^3z^34.若(x+6)(x-7)=x^2+mx+n,则m=( ),n=( )5.已知x+1/x=3,则x^2+1/x^2=
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![1.(x+y)(x-y)(x^2+y^2)=( )2.若x^2+mx+1/4 是一个完全平方式,则m的值为( )3.12x^7y^6z^5÷( )=4x^3y^3z^34.若(x+6)(x-7)=x^2+mx+n,则m=( ),n=( )5.已知x+1/x=3,则x^2+1/x^2=](/uploads/image/z/8693832-48-2.jpg?t=1.%28x%2By%29%28x-y%29%28x%5E2%2By%5E2%29%3D%EF%BC%88+%EF%BC%892.%E8%8B%A5x%5E2%2Bmx%2B1%2F4+%E6%98%AF%E4%B8%80%E4%B8%AA%E5%AE%8C%E5%85%A8%E5%B9%B3%E6%96%B9%E5%BC%8F%2C%E5%88%99m%E7%9A%84%E5%80%BC%E4%B8%BA%EF%BC%88+%EF%BC%893.12x%5E7y%5E6z%5E5%C3%B7%EF%BC%88+%EF%BC%89%3D4x%5E3y%5E3z%5E34.%E8%8B%A5%28x%2B6%29%28x-7%29%3Dx%5E2%2Bmx%2Bn%2C%E5%88%99m%3D%28+%29%2Cn%3D%28+%EF%BC%895.%E5%B7%B2%E7%9F%A5x%2B1%2Fx%3D3%2C%E5%88%99x%5E2%2B1%2Fx%5E2%3D)
1.(x+y)(x-y)(x^2+y^2)=( )2.若x^2+mx+1/4 是一个完全平方式,则m的值为( )3.12x^7y^6z^5÷( )=4x^3y^3z^34.若(x+6)(x-7)=x^2+mx+n,则m=( ),n=( )5.已知x+1/x=3,则x^2+1/x^2=
1.(x+y)(x-y)(x^2+y^2)=( )
2.若x^2+mx+1/4 是一个完全平方式,则m的值为( )
3.12x^7y^6z^5÷( )=4x^3y^3z^3
4.若(x+6)(x-7)=x^2+mx+n,则m=( ),n=( )
5.已知x+1/x=3,则x^2+1/x^2=
1.(x+y)(x-y)(x^2+y^2)=( )2.若x^2+mx+1/4 是一个完全平方式,则m的值为( )3.12x^7y^6z^5÷( )=4x^3y^3z^34.若(x+6)(x-7)=x^2+mx+n,则m=( ),n=( )5.已知x+1/x=3,则x^2+1/x^2=
1.(x+y)(x-y)=x^2-y^2
.(x+y)(x-y)(x^2+y^2)=x^4-y^4
2.x^2+mx+1/4 =(x+(-)1/2)^2
m=1或-1
3.(3x^4)(y^3)(z^2)
4.(x+6)(x-7)=x^2-x-42
m=-1 n=-42
5..(x+1/x)^2=x^2+1/x^2+2=9
x^2+1/x^2=7
(x+y)(x-y)(x^2+y^2)=( x^4-y^4 )
若x^2+mx+1/4 是一个完全平方式,则m的值为(1 )
12x^7y^6z^5÷( 3x^4y^3z^2 )=4x^3y^3z^3
若(x+6)(x-7)=x^2+mx+n,则m=( -1 ),n=( -42 )
已知x+1/x=3,则x^2+1/x^2= 4.25
这些都有公式吧。。。
没过程!
1.(x+y)(x-y)(x^2+y^2)=( x^4-y^4 )
2.若x^2+mx+1/4 是一个完全平方式,则m的值为( ±1 )
3.12x^7y^6z^5÷( 3x^4y^3z^2 )=4x^3y^3z^3
4.若(x+6)(x-7)=x^2+mx+n,则m=( -1 ),n=( -42 )
5.已知x+1/x=3,则x^2+1/x^2= ( 7 )
1.(x+y)(x-y)(x^2+y^2)=( x^4-y^4 )
2.若x^2+mx+1/4 是一个完全平方式,则m的值为( 1 )
3.12x^7y^6z^5÷( 3x^4y^3z^2 )=4x^3y^3z^3
4.若(x+6)(x-7)=x^2+mx+n,则m=( -1 ),n=( -42 )
5.已知x+1/x=3,则x^2+1/x^2= 4.25
1.X^4+Y^4
2.-1
3.
4.m=-1,n=-42
5.9-2=7
1.x^4+y^4
2.m=1
3.3x^4y^3z^2
4.m=-1 n=-42
5.9/2