3. 6√12+√3-7√3 4.√75-2√12-3√27 5. 2√125-3√45+4√20

3. 6√12 + √3 - 7√3 = 6(√4.√3) -6√3
= 6.2√3-6√3
= 12√3-6√3
= 6√3
4. √75-2√12-3√27 = (√25.√3) - 2(√4.√3) - 3(√9.√3)
= 5√3 - 2.2√3 - 3.3√3
= 5√3 - 4√3 - 9√3
= -8√3

5. 2√125 - 3√45 + 4√20 = 2(√25.√5)-3(√9.√5)+4(√4.√5)
= 2.5√5-3.3√5+4.2√5
= 10√5-9√5+8√5
= 9√5

3. 6√12+√3-7√3
= 6√4.3+√3-7√3
= 6.2√3+√3-7√3
=12√3+√3-7√3
=(12+1-7)√3
=6√3

4. √75-2√12-3√27
=√25.3-2√4.3-3√9.3
=5√3-2.2√3-3.3√3
=5√3-4√3-9√3
=(5-4-9)√3
=-8√3

5. 2√125-3√45+4√20
=2√25.5-3√9.5+4√4.5
=2.5√5-3.3√5+4.2√5
=10√5-9√5+8√5
=(10-9+8)√5
=9√5

Titik (.) berarti kali