Question
Find the product : $\left(z^2+3\right)\left(z^2-7\right)$
✓
Answer
$z^4-4 z^2-21$
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The list price of an article is $Rs. 800$ and is available at a discount of $15$ percent. Find :$(i)$ selling price of the article;$ (ii)$ cost price of the article, if a profit of $13 \frac{1}{3} \%$ is made on selling it.
→Compute: $(12)^{-2} \times 3^3 $
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→In the adjoining figure, ABCD is a square and CDE is an equilateral triangle. Find
(i) $\angle AED$
(ii) $\angle EAB$
(iii) reflex $\angle AEC$
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(ii) $\angle EAB$
(iii) reflex $\angle AEC$
Simplify: $\left(-2 x^{\frac{2}{3}} y^{-\frac{3}{2}}\right)^6$
→Simplify :
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→$\frac{x^{2 n+3} \cdot x^{(2 n+1)(n+2)}}{\left(x^3\right)^{2 n+1} \cdot x^{n(2 n+1)}}$
If $a+b=11$ and $a^2+b^2=61$, find the value of $a b$.
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→