Question

if one root of the equation 2xsquare + ax + 6 = 0 is 2 then a is equal to :

A) 7
B) -7
C) 7/2
D) -7/2​

Answer 1

Answer:

put x=2 in the eqn and equate to 0

a=-7

Answer 2

Step-by-step explanation:

2(2)^2+a(2)+6=0

2(4)+2a+6=0

8+6+2a=0

14+2a=0

2a=(-14)

a=(-7)