初二数学计算题计算的(m-n+p)(m+n-p)=[m-( )]=m的二次方-( )的二次方=( )(m+2n)(m-2n)-( )=-2mn-4n的二次方(y-2m)(y+2m)( )=y的四次方-16m的四次方m的二次方-(n+p)的二次方=( )(m-n-p).
2019-04-18
初二数学计算题
计算的(m-n+p)(m+n-p)=[m-( )]=m的二次方-( )的二次方=( )
(m+2n)(m-2n)-( )=-2mn-4n的二次方
(y-2m)(y+2m)( )=y的四次方-16m的四次方
m的二次方-(n+p)的二次方=( )(m-n-p).
优质解答
(m-n+p)(m+n-p)=[m-(n-p)][m+(n-p)]=m^2-(n-p)^2=m^2-(n^2-2np+p^2)
m^2+2mn
y^2+4m^2
m+n+p
^2= 的二次方
(m-n+p)(m+n-p)=[m-(n-p)][m+(n-p)]=m^2-(n-p)^2=m^2-(n^2-2np+p^2)
m^2+2mn
y^2+4m^2
m+n+p
^2= 的二次方