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
Answers
Answered by
1
Answer:
put x=2 in the eqn and equate to 0
a=-7
Answered by
0
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)
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