Question

Сократите дробь!

2)7у-7√6/у²-√6у

4)√23-s/s²-23

Answer 1

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