Question

The rationalising factor of 5 - 2√3 is *

Answer 1

Answer:

5+2 underoot 3 is the answer

Answer 2

$The \: rationalising \:factor \: of \: 5-2\sqrt{3}$

$is \: \underline{ \pink{ 5+2\sqrt{3}}}$

$Here, (5-2\sqrt{3} )(5+2\sqrt{3} )$

$= 5^{2} - (2\sqrt{3})^{2}$

/* By algebraic identity */

$\boxed{ \blue{ (x+y)(x-y) = x^{2} - y^{2} }}$

$= 25 - 12$

$= 13 \: \orange { ( Rational \: number ) }$

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