Question

one upon under root 9 minus under root 8 is equal to​

Answer 1

Answer:

under root 9 - under root 8

=3- 2under root 2

=3-2.28

=0.72

Answer 2

Answer:

Question

To rationalise the denominatir given hu

Answer

as we know to rationalise the denominator we multiply the same number by both numerator and denominator by changing the sign ..

$\frac{1}{ \sqrt{9} - \sqrt{8} } \\ \\ = \geqslant \frac{1}{ \sqrt{9} - \sqrt{8} } \times \frac{ \sqrt{9} + \sqrt{8} }{ \sqrt{9} + \sqrt{8} } \\ \\ = \geqslant \frac{ \sqrt{9} + \sqrt{8} }{( \sqrt{9}) {}^{2} - ( \sqrt{8} ) {}^{2} } \\ \\ = \geqslant \frac{ \sqrt{9} + \sqrt{8} }{9 - 8} \\ \\ = \geqslant \frac{ \sqrt{9} + \sqrt{8} }{1}$