WAEC - Mathematics (2016 - No. 42)

The relation y = x2 + 2x + k passes through the point (2,0). Find the value of k
- 8
- 4
4
8

Explanation

Y = x2 + 2x + k (given)

y = o when x = 2

thus 0 = 22 + 2 x 2 + k

0 = 4 + 4 + k

given k = -8

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