Question 37

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waecmaths question: 

If c and k are roots of $6-x-{{x}^{2}}=0$, find c + k

Option A: 

2

Option B: 

1

Option C: 

–1

Option D: 

–3

waecmaths solution: 

$\begin{align}  & 6-x-{{x}^{2}}=0 \\ & 3(2-x)+x(2-x)=0 \\ & (3+x)(2-x)=0 \\ & x=-3,x=2 \\ & c+k=-3+2=1 \\\end{align}$

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