Question

one root of the equation 2x

2 + ax + 6 = 0 is 3 ,then find the value of a.​

Answer 1

Answer:

$2x {}^{2} + ax + 6 = 0$

$2(3) {}^{2} + a(3) + 6 = 0$

$18 + 3a + 6 = 0$

$a = - 8$