If average of 8 and a^2 is (2a+2), value of a would be

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03 Mar 2011 average

If average of 8 and a^2 is (2a+2), value of a would be

OPtion

1) 0
2) 1
3) 2
4) 3
5) 4
6) 5
7) 6
8) 7
9) 8
10) 9

Solution

2a + 2 = (8 + a^2)/2
4a + 4 = 8 + a^2
a^2 – 4a + 4 = 0
or (a – 2)^2 = 0
or a = 2

Correct Option: 3 Best Solution (0)