Question

√100b-√b+√4b-√81b помогите решить

Answer 1

$sqrt{100b}- sqrt{b} + sqrt{4b} - sqrt{81b} =10sqrt{b} -sqrt{b} +2sqrt{b} -9sqrt{b} =2sqrt{b}$

Answer 2

√100b-√b+√4b-√81b=10√b-√b+2√b-9√b=2√b