Pammie123cakess Pammie123cakess

04-06-2014
Mathematics

contestada

how do I solve (3+i)(3-i)

Respuesta :

kate200468 kate200468

04-06-2014

[tex] (3+i)(3-i)=3(3-i)+i(3-i)=9-3i+3i-i^2=9-(-1)=\\\\=9+1=10[/tex]

Answer Link

05-06-2014

(3+I)(3-1)
-i^2+9=0
-I^2=-9
I^2=9
i= + or - 3

Answer Link

Otras preguntas

what do I do to figure out this problem:3x+8=26+x

what do I do to figure out this problem:3x+8=26+x

I figured out the 1st question but I do not understand the second one...please show me step by step! Thank you!

The diameter of a cylinder is 6 feet 6 inches. The height of a cylinder is 12 feet 3 inches. What is the surface area? (feet squared)What is the volume?

How many moles of water (H2O) would be produced if 10 moles of O2 gas reacted completely with excess H2 gas?2 H2(g) + O2(g) → 2 H2O(g)A. 5 B. 10 C. 20 D. 30

What's the other term for: explosive or changing very quickly

what do I do to figure out this problem:3x+8=26+x

Which expression is equivalent to 27/125

What's the other word generous in overlooking insult or injury by others; rising above pettiness

what is glossities and deficiency