25x²+( ) +9x²=(5x-3y)²,a²+( )+16b²=( )16a²+24a²+( )= ( )²,( )²-8p(m+n)+16p²=( )²,若(5x+m)²=25x²-10xy+N,则m=﹙﹚,N=﹙﹚

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25x²+( ) +9x²=(5x-3y)²,a²+( )+16b²=( )16a²+24a²+( )= ( )²,( )²-8p(m+n)+16p²=( )²,若(5x+m)²=25x²-10xy+N,则m=﹙﹚,N=﹙﹚
25x²+( ) +9x²=(5x-3y)²,a²+( )+16b²=( )
16a²+24a²+( )= ( )²,( )²-8p(m+n)+16p²=( )²,若(5x+m)²=25x²-10xy+N,则m=﹙﹚,N=﹙﹚

25x²+( ) +9x²=(5x-3y)²,a²+( )+16b²=( )16a²+24a²+( )= ( )²,( )²-8p(m+n)+16p²=( )²,若(5x+m)²=25x²-10xy+N,则m=﹙﹚,N=﹙﹚
25x²+(-30xy ) +9y²=(5x-3y)²,
a²+(8ab )+16b²=( a+4b)²
16a²+24ab+( 3b )²= ( 4a+3b )²,( m+n )²-8p(m+n)+16p²=( m+n-4p )²,若(5x+m)²=25x²-10xy+N,则m=﹙-y﹚,N=﹙y²﹚