4.2×4.2−1.9×1.92.3×6.1isequalto:4.2×4.2−1.9×1.92.3×6.1isequalto:\eqalign{ & \frac{{4.2 \times 4.2 - 1.9 \times 1.9}}{{2.3 \times 6.1}}\, \cr & {\text{is}}\,{\text{equal}}\,{\text{to:}} \cr} " /> 4.2×4.2−1.9×1.92.3×6.1isequalto:4.2×4.2−1.9×1.92.3×6.1isequalto:\eqalign{ & \frac{{4.2 \times 4.2 - 1.9 \times 1.9}}{{2.3 \times 6.1}}\, \cr & {\text{is}}\,{\text{equal}}\,{\text{to:}} \cr} " /> 4.2×4.2−1.9×1.92.3×6.1isequalto:4.2×4.2−1.9×1.92.3×6.1isequalto:\eqalign{ & \frac{{4.2 \times 4.2 - 1.9 \times 1.9}}{{2.3 \times 6.1}}\, \cr & {\text{is}}\,{\text{equal}}\,{\text{to:}} \cr} " />

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$\begin{aligned} \frac{4.2 \times 4.2 - 1.9 \times 1.9}{2.3 \times 6.1} \\ is equal to: \end{aligned}$ $\eqalign{ & \frac{{4.2 \times 4.2 - 1.9 \times 1.9}}{{2.3 \times 6.1}}\, \cr & {\text{is}}\,{\text{equal}}\,{\text{to:}} \cr}$

10.5
21.0
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Answer:- 1

Explanation:-

Solution:

\begin{aligned} G i v e n E x p r e s s i o n \\ = \frac{(a^{2} - b^{2})}{(a + b) (a - b)} \\ = \frac{(a^{2} - b^{2})}{(a^{2} - b^{2})} \\ = 1 \end{aligned}

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", "text": "

\begin{aligned} \frac{4.2 \times 4.2 - 1.9 \times 1.9}{2.3 \times 6.1} \\ is equal to: \end{aligned}

$\eqalign{ & \frac{{4.2 \times 4.2 - 1.9 \times 1.9}}{{2.3 \times 6.1}}\, \cr & {\text{is}}\,{\text{equal}}\,{\text{to:}} \cr}$ ", "dateCreated": "7/24/2019 10:09:12 AM", "author": { "@type": "Person", "name": "Nitin Sir" }, "answerCount": "4", "acceptedAnswer": { "@type": "Answer", "text": "

Solution:

\begin{aligned} G i v e n E x p r e s s i o n \\ = \frac{(a^{2} - b^{2})}{(a + b) (a - b)} \\ = \frac{(a^{2} - b^{2})}{(a^{2} - b^{2})} \\ = 1 \end{aligned}

$\eqalign{ & Given\,Expression \cr & = \frac{{\left( {{a^2} - {b^2}} \right)}}{{\left( {a + b} \right)\left( {a - b} \right)}} \cr & = \frac{{\left( {{a^2} - {b^2}} \right)}}{{\left( {{a^2} - {b^2}} \right)}} \cr & = 1 \cr}$ ", "dateCreated": "7/24/2019 10:09:12 AM", "author": { "@type": "Person", "name": "Nitin Sir" } }, "suggestedAnswer": { "@type": "Answer", "text": "

Solution: