Maths-
SAT
Easy
Question
If y = x2 + ax + a, where a is a constant , and y = 11 when x = 1, what is the value of a?
- -5
- -2
- 2
- 5
The correct answer is: 5
y = x2 +ax + a
and y = 11 when x = 1.
11 = 12 + a + a
11 = 1 + 2a
10 = 2a
a = 5
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