Question

Find the value(s) of k for which the quadratic equation x2 + 2/2 kx +18 = 0 has equal roots.​

Answer 1

Step-by-step explanation:

when the quadratic equation has real roots then its discriminants will be equal to zero.

so by the above condition b²-4ac=0

so,(2/2k)²-4×1×18=0

4/4k²-72=0

4/4k²=72

4k²=4/72

4k²=1/18

k²=1/36

k=1/6

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