What is true about the complex number -5 + 5i? Check all that apply.

A. The modulus is 10.
B. It lies in quadrant 2.
C. It lies in quadrant 4.
D. The modulus is 5 square root of 2.

Question

What is true about the complex number -5 + 5i? Check all that apply.

 A.	The modulus is 10.
 B.	It lies in quadrant 2.
 C.	It lies in quadrant 4.
 D.	The modulus is 5 square root of 2.

shamim · Answer

b

anonymous · Answer

any ideas for what quadrant it is in?  graph it and you will see

anonymous · Answer

B is not the only correct answer...

anonymous · Answer

its B i graphed it.

anonymous · Answer

but im not sure if the other answers are correct like you said @satellite73

anonymous · Answer

ok good
now do you know how to take the modulus

anonymous · Answer

i dont know how to take the modulus sorry

anonymous · Answer

$$|a+bi|=\sqrt{a^2+b^2}$$

anonymous · Answer

a=-5 b=5?

anonymous · Answer

yes, but you can ignore the minus sign if you like

anonymous · Answer

since it will go away when you square it

anonymous · Answer

so a and b are both 5?

anonymous · Answer

yes

anonymous · Answer

well actually $a=-5$ as you said, but $(-5)^2=25$ just like $5^2=25$

anonymous · Answer

oh i see it lol

anonymous · Answer

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