Question

can anyone rationalise this

Answer 1

hi hope this is the correct answeer and this helps u...

Answer 2

$\frac{7}{ \sqrt{15} + 2 \sqrt{2} } = \frac{7( \sqrt{15} - 2 \sqrt{2} )}{( \sqrt{15} + 2 \sqrt{2} )( \sqrt{15} - 2 \sqrt{2}) } \\ = \frac{7 \sqrt{15} - 14 \sqrt{2} }{ { \sqrt{15} }^{2} - {(2 \sqrt{2} )}^{2} } \\ = \frac{7 \sqrt{15} - 14 \sqrt{2} }{15 - 8} \\ = \frac{7( \sqrt{15} - 2 \sqrt{2}) }{7} \\ = \sqrt{15 } - 2 \sqrt{2}$
I hope it helps