waecmaths question:
The relation $y={{x}^{2}}+2x+k$passes through (2,0). Find the value of k
Option A:
–8
Option B:
–4
Option C:
4
Option D:
8
waecmaths solution:
$\begin{align} & y={{x}^{2}}+2x+k \\ & \text{When it pass through the point (2,0)} \\ & 0={{2}^{2}}+2(2)+k \\ & k=-8 \\\end{align}$
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