Find the positive value of k for which the equation x^2-kx+4=0 and x^2-4x+k=0 with both have real roots.
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using the discriminant
if discriminant is greater than zero, then the equation will have real roots.
PS: discriminant= b²-4ac
if discriminant is greater than zero, then the equation will have real roots.
PS: discriminant= b²-4ac
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