### 5 Answers

Relevance

- aeiouLv 71 decade agoFavorite Answer
2√[72] + √[32] – 4√[18] =

2*6√2 + 4√2 – 4*3√2 =

12√2 + 4√2 – 12√2 = 4√2

The answer is 4√2

::

- ♪♥Annie♥♪Lv 61 decade ago
First: simplify each square root: break them down (72, 32, 18)

Second: solve according to order of operations:

- How do you think about the answers? You can sign in to vote the answer.
- 1 decade ago
2sq(72)+sq(32)-4sq(18)

2*sq(9*8) +sq(8*4)-4sq(9*2)

2*sq(3*3*2*2*2)+sq(2*2*2*2*2)-4sq(3*3*2)

2*3*2sq(2)+2*2sq(2)-4*3sq(2)

12sq(2)+4sq(2)-12sq(2)

=4sq(2)

Still have questions? Get your answers by asking now.