Question

(√175+√75) ( √7-√3 )
упростить

Answer 1

$( \sqrt{175}+ \sqrt{75} )( \sqrt{7} - \sqrt{3} )=( \sqrt{7*25}+ \sqrt{3*25} )( \sqrt{7} - \sqrt{3} )= \\ =5( \sqrt{7}+ \sqrt{3} )( \sqrt{7} - \sqrt{3} )=5(7-3)=5*4=20$

Answer 2

√175√7-√175*√3+√75√7-√75√3=√1225-√525+√525-√225=35-5√21+5√21-15=20