Find the value of 11 -7-2 -7-7 -

The correct option is D 12√(7)11√(7)+2√(7) √(7) Taking √(7) common from the expression nbsp; So, nbsp; 11√(7)+2√(7) √(7)= (11+2 1)√(7) nbsp; nbsp; ...

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Byju's Answer

Standard IX

Mathematics

Addition and Subtraction of Surds

Find the valu...

Question

Find the value of $11 \sqrt{7} + 2 \sqrt{7} - \sqrt{7}$ ?

\sqrt{7}

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7 \sqrt{1} 2

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12 \sqrt{7}

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13 \sqrt{7}

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Solution

The correct option is C $12 \sqrt{7}$
$11 \sqrt{7} + 2 \sqrt{7} - \sqrt{7}$
Taking $\sqrt{7}$ common from the expression
So,
$11 \sqrt{7} + 2 \sqrt{7} - \sqrt{7} = (11 + 2 - 1) \sqrt{7}$
= $12 \sqrt{7}$

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Similar questions

Q. Find the value of

a

and

b

\frac{\sqrt{11} - \sqrt{7}}{\sqrt{11} + \sqrt{7}} = a - b \sqrt{77}

Q. Find the missing value:

\frac{- 4}{7} + \frac{- 7}{11} = \frac{- 7}{11} + . . . . .

Q. If

p

\frac{7 - \sqrt{11}}{7 + \sqrt{11}}

and

q

\frac{7 + \sqrt{11}}{7 - \sqrt{11}}

,then find the value of

(p + q)^{2}

The value of

$\frac{- 2}{7} + \frac{- 4}{11} + \frac{- 12}{7} + \frac{- 7}{11}$ is ___.

\frac{\sqrt{11} + \sqrt{7}}{\sqrt{11} - \sqrt{7}} = a - \sqrt{77} b

Then find the value of

a

b

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Find the value of 11√7+2√7−√7 ?

The correct option is C 12√711√7+2√7−√7 Taking √7 common from the expression So, 11√7+2√7−√7=(11+2−1)√7 = 12√7

Find the value of $11 \sqrt{7} + 2 \sqrt{7} - \sqrt{7}$ ?

The correct option is C $12 \sqrt{7}$
$11 \sqrt{7} + 2 \sqrt{7} - \sqrt{7}$
Taking $\sqrt{7}$ common from the expression
So,
$11 \sqrt{7} + 2 \sqrt{7} - \sqrt{7} = (11 + 2 - 1) \sqrt{7}$
= $12 \sqrt{7}$