B. Sederhanakan bentuk akar berikut

Jawaban:

1. 6√2+4√2-7√2

= (6+4-7)√2

= 3√2

2. 2√3-√48

= 2√3-√16×3

=2√3-4√3

= (2-4)√3

= -2√3

3. √20+√45

=√4×5+√9×5

=2√5+3√5

= (2+3)√5

= 5√5

4. √48+√108-√27

= √16×3+√36×3-√9×3

= 4√3+6√3-3√3

=(4+6-3)√3

= 7√3