Question

if one root of the quadratic equation 2 X square + kX - 6 equal to zero is 2 find the value of k​

Answer 1

$\huge{\mathfrak{\blue{\underline{Answer}}}}$

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

$\huge{\mathfrak{\blue{\implies{\underline{k=-1}}}}}$

Answer 2

Answer:

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