熟能生巧 4（请在2分钟内完成10道题目）平方差

[latex](x+3)(x-3)= x^{2}-?[/latex] 

[latex](m-4)(m+4)= m^{?}-16[/latex] 

[latex](x+y)(x-y)= x^{2} ? y^{2} [/latex] 

[latex](5+z)(5-z)= ?-z^{2}[/latex] 

[latex]-(n+6)(n-6)= 36?n^{2}[/latex]

[latex](-3+y)(-3-y)= ?-y^{2}[/latex] 

[latex](-p-q)(-p+q)= p^{2}-?^{2}[/latex] 

[latex]( x^{2} +8)( x^{2} -8)= x^{?}-64[/latex] 

[latex]( x^{3} +5)( x^{3} -5)= x^{?}-25[/latex] 

[latex]( x^{4} +2)( x^{4} -2)= x^{?}-4[/latex]