waecmaths question:
Find the quadratic equation whose roots are c and –c
Option A:
${{x}^{2}}+{{c}^{2}}$
Option B:
${{x}^{2}}-{{c}^{2}}=0$
Option C:
${{x}^{2}}+2cx-{{c}^{2}}=0$
Option D:
${{x}^{2}}-2cx+{{c}^{2}}=0$
waecmaths solution:
$\begin{align} & (x-c)(x+c)=0 \\ & {{x}^{2}}-{{c}^{2}}=0 \\\end{align}$
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