Question

3√8-5√32 7√3-√1/3 √40-5√10分之1+√10

Answer 1

3√8-5√32

=3×√4×√2-5×√16×√2

=3×2×√2-5×4×√2

=6√2-20√2

=-14√2

7√3-√(1/3)

=7√3-√(3/9)

=7√3-√3/√9

=7√3-(√3)/3

=(20√3)/3

√40-5√(1/10)+√10

=√4×√10-5√(10/100)+√10

=2×√10-(5×√10)/√100+√10

=2√10-(5√10)/10+√10

=3√10-(√10)/2

=(5√10)/2