1.5xy^2-20x^3
2.-6x^2y^2+96
3.m^2-n^2+3m+3n
thx~
數學高手請來
2007-01-25 2:07 am
回答 (5)
2007-01-25 2:10 am
✔ 最佳答案
1.5xy^2-20x^3
=5x(y^2-4x^2)
=5x(y+2x)(y-2x)
2.
-6x^2y^2+96
=6(16-x^2y^2)
=6(4^2-(xy)^2)
=6(4+xy)(4-xy)
3.
m^2-n^2+3m+3n
=(m+n)(m-n)+3(m+n)
=(m+n)(m-n+3)
2007-01-25 2:48 am
1.5xy²-20x³
=5x(y²-4x²)
=========================================================
2.-6x²y²+96
=96-6x²y²
=6(16-x²y²)
=========================================================
3.m²-n²+3m+3n
=(m+n)(m-n)+3(m+n)
=(m+n)(3+m-n)
=5x(y²-4x²)
=========================================================
2.-6x²y²+96
=96-6x²y²
=6(16-x²y²)
=========================================================
3.m²-n²+3m+3n
=(m+n)(m-n)+3(m+n)
=(m+n)(3+m-n)
參考: 數學能手Me
2007-01-25 2:25 am
1.5xy^2-20x^3
2.-6x^2y^2+96
3.m^2-n^2+3m+3n
2.-6x^2y^2+96
3.m^2-n^2+3m+3n
2007-01-25 2:18 am
1.=5x(y+2x)(y-2x)
2.=6(4+xy)(4-xy)
3.=(m+n)(m-n+3)
2.=6(4+xy)(4-xy)
3.=(m+n)(m-n+3)
2007-01-25 2:16 am
1.5xy^2-20x^3
2.-6x^2y^2+96
3.m^2-n^2+3m+3n
2.-6x^2y^2+96
3.m^2-n^2+3m+3n
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