Question

Write all the value of K for which the quadratic equation 2x^2+kx+8=0,has equal roots also find the roots.


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Answer 1

Step-by-step explanation:

b²-4ac

k²-16x4

k²-64

k±8

Answer 2

Step-by-step explanation:

∴k = ± 8. If the quadratic equation is of the form ax2 + bx + c has equal roots then its discriminant is equal to zero. ∴ k = ± 8.