मराठी

sqrt(2)(sqrt(8) + sqrt(18)) when simplified becomes ______. - Mathematics

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प्रश्न

`sqrt(2)(sqrt(8) + sqrt(18))` when simplified becomes ______.

पर्याय

  • `2sqrt(7)`

  • 10

  • `sqrt(52)`

  • 8

MCQ
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उत्तर

`sqrt(2)(sqrt(8) + sqrt(18))` when simplified becomes 10.

Explanation:

We need to simplify:

`sqrt(2)(sqrt(8) + sqrt(18))`

Step 1: Simplify inside the parentheses

`sqrt(8)`

= `sqrt(4 xx 2)`

= `2sqrt(2)`

`sqrt(18)`

= `sqrt(9 xx 2)`

= `3sqrt(2)`

So, `sqrt(8) + sqrt(18)`

= `2sqrt(2) + 3sqrt(2)`

= `5sqrt(2)`

Step 2: Multiply by `sqrt(2)`

`sqrt(2) xx 5sqrt(2)`

= `5(sqrt(2) xx sqrt(2))`

= 5 × 2

= 10

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पाठ 1: Rational and Irrational Numbers - MULTIPLE CHOICE QUESTIONS [पृष्ठ १७]

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बी निर्मला शास्त्री Mathematics [English] Class 9 ICSE
पाठ 1 Rational and Irrational Numbers
MULTIPLE CHOICE QUESTIONS | Q 17. | पृष्ठ १७
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