if the root of x square + kx + K is equals to zero are real and equal what is the value of k
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b^2-4ac=0
k^2-4×k=0
=k^2-4k=0
k=4
k(k-4)=0
k=0
Hence k=0and 4
k^2-4×k=0
=k^2-4k=0
k=4
k(k-4)=0
k=0
Hence k=0and 4
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