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Mathematics · 2022 · 2 marks
CBSE 2022 · Region 2 · Set 2 · Q5
Solve the quadratic equation: x^2-2 a x+( a^2- b^2)=0 for x.
Solve the quadratic equation : $\displaystyle x^{2}-2 \mathrm{a} x+\left(\mathrm{a}^{2}-\mathrm{b}^{2}\right)=0$ for $\displaystyle x$.
Marking-scheme solution
$\displaystyle \begin{array}{l}\mathrm{D}=4 b^{2}
x=\frac{2 a \pm 2 b}{2}
\Rightarrow x=a+b, a-b\end{array}$
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CBSE Class 10 Mathematics past-paper question from the 2022 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.