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# A few quick maths questions! PS. Its a bit of a competition! watch

1. 1........ -b/2a
2. (Original post by RichE)
Can we do these in reverse order?
hehe - patience is a virtue RichE - showy oxford people
3. (Original post by DaveManUK)
1 as roots add to 2 and are conjugate complex numbers
4. (Original post by Rustyk1)

Points:
Spenceman_ = 1

Question 3:

Find the real part of either solution of

x² - 2x + 5 = 0

Getting tricker now?
1+-2i - in my head-> real part is 1
5. (Original post by Phil23)
hehe - patience is a virtue RichE - showy oxford people
Am I tired or did Phil just call me showy?

As George Bush might have said if he could pronounce tetrasyllabic words - read my emoticons
6. (Original post by RichE)
1 as roots add to 2 and are conjugate complex numbers
obviously. from fta.
7. (Original post by RichE)
Am I tired or did Phil just call me showy?

As George Bush might have said if he could pronounce tetrasyllabic words - read my emoticons
originally used "arrogant" but thought you'd get offended, so wuickly editted it

pk
8. (Original post by Phil23)
originally used "arrogant" but thought you'd get offended, so wuickly editted it

pk
Actually, you used "arrognat"
9. Slow reactions this time! Be patient they will get trickier.

Points:
Spenceman_ = 1
DaveManUK = 1

Question 4

Find the modulus of the complex number (7-4i)
10. √(7²+4²) = √(65)
11. SsEe, correct, and fast too!

Points:
Spenceman_ = 1
DaveManUK = 1
SsEe = 1

Question 5

find the argument of the complex number

(-1 +2i)

12. 90+arctan(2) degrees
13. (2d.p.)
15. 153.4349488229220106484278062795 5 degrees to 29 d.p
16. lol
17. still havent heard the right answer
18. (Original post by Rustyk1)
thats wrong arg is measured ±0:180.

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