多项式:x^4-y^4,x^4+2x^2y^2+y^4,x^3y+xy^3的公因式是( )填空:(-3+0.2b^2)(-3-0.2b^2)=( )分解因式:(x+y)^2-z^2=( )分解因式:4x^2+4分之1-2x-9y^2=( )若x-y=0,则代数式x^3+x^2y-xy^2-y^3的值是( )已知x-y=2,xy=8,则x^2+y^2=( )
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/21 03:22:21
![多项式:x^4-y^4,x^4+2x^2y^2+y^4,x^3y+xy^3的公因式是( )填空:(-3+0.2b^2)(-3-0.2b^2)=( )分解因式:(x+y)^2-z^2=( )分解因式:4x^2+4分之1-2x-9y^2=( )若x-y=0,则代数式x^3+x^2y-xy^2-y^3的值是( )已知x-y=2,xy=8,则x^2+y^2=( )](/uploads/image/z/1644475-67-5.jpg?t=%E5%A4%9A%E9%A1%B9%E5%BC%8F%3Ax%5E4-y%5E4%2Cx%5E4%2B2x%5E2y%5E2%2By%5E4%2Cx%5E3y%2Bxy%5E3%E7%9A%84%E5%85%AC%E5%9B%A0%E5%BC%8F%E6%98%AF%28+%29%E5%A1%AB%E7%A9%BA%3A%28-3%2B0.2b%5E2%29%28-3-0.2b%5E2%29%3D%28+%29%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8F%3A%28x%2By%29%5E2-z%5E2%3D%28+%29%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8F%3A4x%5E2%2B4%E5%88%86%E4%B9%8B1-2x-9y%5E2%3D%28+%29%E8%8B%A5x-y%3D0%2C%E5%88%99%E4%BB%A3%E6%95%B0%E5%BC%8Fx%5E3%2Bx%5E2y-xy%5E2-y%5E3%E7%9A%84%E5%80%BC%E6%98%AF%28+%29%E5%B7%B2%E7%9F%A5x-y%3D2%2Cxy%3D8%2C%E5%88%99x%5E2%2By%5E2%3D%28+%29)
多项式:x^4-y^4,x^4+2x^2y^2+y^4,x^3y+xy^3的公因式是( )填空:(-3+0.2b^2)(-3-0.2b^2)=( )分解因式:(x+y)^2-z^2=( )分解因式:4x^2+4分之1-2x-9y^2=( )若x-y=0,则代数式x^3+x^2y-xy^2-y^3的值是( )已知x-y=2,xy=8,则x^2+y^2=( )
多项式:x^4-y^4,x^4+2x^2y^2+y^4,x^3y+xy^3的公因式是( )
填空:
(-3+0.2b^2)(-3-0.2b^2)=( )
分解因式:(x+y)^2-z^2=( )
分解因式:4x^2+4分之1-2x-9y^2=( )
若x-y=0,则代数式x^3+x^2y-xy^2-y^3的值是( )
已知x-y=2,xy=8,则x^2+y^2=( )
多项式:x^4-y^4,x^4+2x^2y^2+y^4,x^3y+xy^3的公因式是( )填空:(-3+0.2b^2)(-3-0.2b^2)=( )分解因式:(x+y)^2-z^2=( )分解因式:4x^2+4分之1-2x-9y^2=( )若x-y=0,则代数式x^3+x^2y-xy^2-y^3的值是( )已知x-y=2,xy=8,则x^2+y^2=( )
多项式:x^4-y^4,x^4+2x^2y^2+y^4,x^3y+xy^3的公因式是(x^2+y^2)
x^4-y^4=(x^2+y^2)(x+y)(x-y)
x^4+2x^2y^2+y^4=(x^2+y^2)^2
x^3y+xy^3=xy(x^2+y^2)
填空:
(-3+0.2b^2)(-3-0.2b^2)=(9-0.04b^2)
分解因式:(x+y)^2-z^2=(x+y+z)(x+y-z)
分解因式:4x^2+4分之1-2x-9y^2=(2x-3y-1/2)(2x+3y-1/2)
若x-y=0,则代数式x^3+x^2y-xy^2-y^3的值是(0) x^3+x^2y-xy^2-y^3
=x^2(x+y)-y^2(x+y)
=0-0
=0
已知x-y=2,xy=8,则x^2+y^2=(20)
x^2+y^2=(x-y)^2+2xy=4+16=20