Question

6.
If 2 is the root of the equation, x2 + ax + 12 = 0 and the quadratic equation x2 + ax + q = 0 has
equal roots. Then the value of q is:
OPTIONS
Mark for Review
ΑΟ
12
Во
8
со
20
16
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Answer 1

Answer:

A)12

Step-by-step explanation:

x=2

x²+ax+12=0

(2)²+a(2)+12=0

4+2a+12=0

2a+12+4=0

2a+16=0

2a=(-16)

a=(-16)/2

a=(-8)

x=2, a=(-8)

x²+ax+q=0

(2)²+2(-8)+q=0

4-16+q=0

(-12)+q=0

q=12