y=x^2 -4x=x^2+5x=( )^2=( )
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y=x^2 -4x=x^2+5x=( )^2=( )
y=x^2 -4x=x^2+5x=( )^2=( )
y=x^2 -4x=x^2+5x=( )^2=( )
y=x^2 -4x=x^2+5x=( x)^2=( 0)
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