Question

Which of the following expressions can be combined?

Answer 1

Answer: Choice C

Work Shown:

`2√(12) - 6√(27)\\\\2√(4*3) - 6√(9*3)\\\\2√(4)*√(3) - 6√(9)*√(3)\\\\2*2*√(3) - 6*3*√(3)\\\\4√(3) - 18√(3)\\\\(4-18)√(3)\\\\-14√(3)\\\\`

In short,

`2√(12) - 6√(27)=-14√(3)`