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If (64)² - (36)² = 20 x x, then x = ?

170
2120
3180
4140

Answer:- 1

Explanation:-

Solution:

\begin{aligned} 20 \times x = (64 + 36) (64 - 36) \\ = 100 \times 28 \\ \Rightarrow x = \frac{100 \times 28}{20} \\ = 140 \end{aligned}

$\eqalign{ & 20 \times x = \left( {64 + 36} \right)\left( {64 - 36} \right) \cr & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 100 \times 28 \cr & \,\,\, \Rightarrow \,x\, = \frac{{100 \times 28}}{{20}} \cr & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 140 \cr}$

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", "dateCreated": "7/24/2019 10:09:12 AM", "author": { "@type": "Person", "name": "Nitin Sir" } }, "suggestedAnswer": { "@type": "Answer", "text": "

Solution:

\begin{aligned} 20 \times x = (64 + 36) (64 - 36) \\ = 100 \times 28 \\ \Rightarrow x = \frac{100 \times 28}{20} \\ = 140 \end{aligned}

$\eqalign{ & 20 \times x = \left( {64 + 36} \right)\left( {64 - 36} \right) \cr & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 100 \times 28 \cr & \,\,\, \Rightarrow \,x\, = \frac{{100 \times 28}}{{20}} \cr & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 140 \cr}$ ", "dateCreated": "7/24/2019 10:09:12 AM" } }

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