Question

Сократите дробь! 2)7у-7√6/у²-√6у 4)√23-s/s²-23

Answer 1

$\frac{7y-7 \sqrt{6} }{y ^{2}- \sqrt{6}y }= \frac{7*(y- \sqrt{6}) }{y*(y- \sqrt{6}) }= \frac{7}{y}$
$\frac{ \sqrt{23}-s }{s ^{2}-23 }= \frac{-(s- \sqrt{23}) }{(s- \sqrt{23})*(s+ \sqrt{23}) }=- \frac{1}{s+ \sqrt{23} }$