Question

Find the value of K for the quadratic equation 4x square + kx+ 4= 0, show that it has equal root

Answer 1

b^2 -4ac=0
k^2-4*4*4=0
k^2=64
k=8

Answer 2

4x²+kx+4 = 0

For equal roots = b²-4ac = 0

k² - 4*4*4 = 0

k² = 64

k = ±8

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