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# Surds Watch

1. Simplify:
(2+2√3) (3-√3)

How do I work out 2√3 * -√3?

Thank you!
2. (Original post by RosaA)
Simplify:
(2+2√3) (3-√3)

How do I work out 2√3 x -√3?

Thank you!
2√3 x -√3 = 2 * (√3 * √3) * -1

= 2 * 3 * -1

= -6
3. (Original post by RosaA)
Simplify:
(2+2√3) (3-√3)

How do I work out 2√3 x -√3?

Thank you!
Never mind, you use x for multiplication.
4. (Original post by Gaiaphage)
2√3 x -√3 = 2 * (√3 * √3) * -1

= 2 * 3 * -1

= -6
Thank you... Where did the -1 come from? -sorry I'm slightly confused
5. (Original post by AlmostNotable)
Never mind, you use x for multiplication.
Changed to *
6. (Original post by RosaA)
Simplify:
(2+2√3) (3-√3)

How do I work out 2√3 * -√3?

Thank you!
7. (Original post by Zacken)
Thank you
8. (Original post by RosaA)
Thank you... Where did the -1 come from? -sorry I'm slightly confused
You were multiplying it by -√3, so I took the -1 out so you could see that you had √3*√3 in there, which is 3

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