Question 41

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waecmaths question: 

Which of the following is a factor of $2-x-{{x}^{2}}$ 

Option A: 

1 – x

Option B: 

1 + x

Option C: 

x – 1

Option D: 

2 – x

waecmaths solution: 

$\begin{align}  & 2-x-{{x}^{2}}=2+x-2x-{{x}^{2}} \\ & =1(2+x)-x(2+x) \\ & =(1-x)(2+x) \end{align}$

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