Question

[5+√7][2+√7] what will be the answer of this equation ​

Answer 1

Answer:

[5+√7][2+√7] = 5(2+√7) + √7(2+√7)

= 10 + 5√7 + 2√7 + 7

= 17 + 5√7 + 2√7

The value of √7 is 2.64 (approx.)

17+ 5(2.64)+2(2.64) = 17 + 13.2 + 5.28 = 35.48 (approx.)

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Answer 2

Answer:

$\huge{\fbox{\fbox{\bigstar{\mathfrak{\red{Answer}}}}}}$

Step-by-step explanation:

$= (5 + \sqrt{7} )(2 + \sqrt{7} ) \\ = 10 + 2 \sqrt{7} + 5 \sqrt{7} + \sqrt{49} \\ = 10 + 7\sqrt{7} + 7 \\ = 17 + 7 \sqrt{7} \\ and \: we \: know \: \sqrt{7} = 2.645.. \\ = 17 + 7 \times 2.645 \\ = 17 + 18.52 \\ = 35.52$

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