Question

Write the expression in standard form.

7/ 3-15i

A. 7/78 - 35/78i

B. -7/78 - 35/78i


C. 7/78 + 35/78i

D. -7/78 + 35/78i

Answer 1

multiply numerator and denominator by the conjugate of denominator (3+15i).
separate real and imaginary parts

Answer 2

so would the answer be C?

Answer 3

i'm confused :(

Answer 4

u r right.. dnt confuse

Answer 5

so it is C.. ?

Answer 6

yep

Answer 7

ohh ok thankyou!! by any chance would u no the answer to this..

Find the product of the complex number and its conjugate.
1 + 3i

A. 1 + 9i

B. 10

C. -8

D. 1 - 9i

i kept getting 1-9i .. but im not sure?

Answer 8

(1+3i)x(1-3i) is of the form (a+b)(a-b)=a^2-b^2
here a=1 and b=3i
so a^2 - b^2=_________

Answer 9

= 10?

Answer 10

yep