Question 127426
3sqrt(27)+3
=3sqrt(9*3)+3
=9sqrt(3)+3
.
2sqrt(12)-7sqrt(3)
=2sqrt(4*3)-7sqrt(3)
=4sqrt(3)-7sqrt(3)
=-3sqrt(3)
.
sqrt(8)+2sqrt(2)
sqrt(4*2)+2sqrt(2)
2sqrt(2)+2sqrt(2)
=4sqrt(2)
.
Ed