find k if the sum of the quadratic equation x^ - 4kx +k+3 =0 is double their product
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x2−4kx+k+3=0
α+β=4k
αβ=(k+3)
α+β=2αβ
⇒4k=2(k+3)
⇒4k=2k+6
⇒2k=6
⇒k=3.
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