Thread: Surds question 1

Work out (5 - square root of 2) (2 + 5 square root of 2) all divided by square root of 8

I got 11.5 is this correct?

Can you use FOIL to expand the numerator?

e^(i*pi) I think you miss read my question, sorry I wish I could write in that special language. The second bracket is (2 + 5 square root of 2)

Originally Posted by Natasha1

Work out (5 - square root of 2) (2 + 5 square root of 2) all divided by square root of 8

I got 11.5 is this correct?

Yes.