因式分解3个填空题a^2-10a+( )=( )^2( )+2ay+1=( )^21/4-( )+r^2s^2=( )^2

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因式分解3个填空题a^2-10a+( )=( )^2( )+2ay+1=( )^21/4-( )+r^2s^2=( )^2
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因式分解3个填空题a^2-10a+( )=( )^2( )+2ay+1=( )^21/4-( )+r^2s^2=( )^2
因式分解3个填空题
a^2-10a+( )=( )^2
( )+2ay+1=( )^2
1/4-( )+r^2s^2=( )^2

因式分解3个填空题a^2-10a+( )=( )^2( )+2ay+1=( )^21/4-( )+r^2s^2=( )^2
a^2-10a+(25)=(a-5)^2
(a²y²)+2ay+1=(ay+1)^2
1/4-(rs)+r^2s^2=(1/2-rs)^2