Jambmaths question:
$\begin{align} & \text{If }S=\sqrt{{{t}^{2}}-4t+4},\text{ find }t\text{ in terms of }S \\ & \text{(A) }{{S}^{2}}-2\text{ (B) }S+2\text{ (C) }S-2\text{ (D) }{{S}^{2}}+2 \\\end{align}$
Jamb Maths Solution:
$\begin{align} & S=\sqrt{{{t}^{2}}-4t+4} \\ & S=\sqrt{{{(t-2)}^{2}}}={{\left[ {{(t-2)}^{2}} \right]}^{\tfrac{1}{2}}} \\ & S=t-2 \\ & t=S+2 \\\end{align}$
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