Question 9

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Jambmaths question: 

Find y, if $\sqrt{12}-\sqrt{147}+y\sqrt{3}=0$

Option A: 

1

Option B: 

3

Option C: 

5

Option D: 

7

Jamb Maths Solution: 

$\begin{align}  & \sqrt{12}-\sqrt{147}+y\sqrt{3}=0 \\ & \sqrt{4\times 3}-\sqrt{49\times 3}+y\sqrt{3}=0 \\ & 2\sqrt{3}-7\sqrt{3}+y\sqrt{3}=0 \\ & -5\sqrt{3}+y\sqrt{3}=0 \\ & y\sqrt{3}=5\sqrt{3} \\ & y=5 \end{align}$

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