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Operations on Algebraic Expressions — MATHS STD 8 — Question

Gujarat BoardEnglish MediumSTD 8MATHSOperations on Algebraic Expressions2 Marks
Question
Find following products: $\Big(2\text{a}+\frac{3}{\text{b}})(2\text{a}-\frac{3}{\text{b}}\Big)$
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Answer

$\Big(2\text{a}+\frac{3}{\text{b}})(2\text{a}-\frac{3}{\text{b}}\Big)$ $=(2\text{a})^2-\Big(\frac{3}{\text{b}}\Big)^2$ $=4\text{a}^2-\frac{9}{\text{b}^2}$

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