Question

one of the roots of quadratic equation is -2 find m 2x²+kx-2=0​

Answer 1

Answer:

as one root of the quadratic equation is -2

$2 {x}^{2} + kx - 2 = 0 \\ 2 {( - 2)}^{2} + k( - 2) - 2 = 0 \\ 2 \times 4 - 2k - 2 = 0 \\ 8 - 2k - 2 = 0 \\ - 2k - 6 = 0 \\ 2k + 6 = 0 \\ 2k = - 6 \\ k = - 3$

Step-by-step explanation:

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