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

Why doesn't the air run out of oxygen or fill up with carbon dioxide

Two wires are used to suspend a sign that weighs 500 N. The two wires make an angle of 100° between each other. If each wire is exerting an equal amount of forc

What invention most helped to make the shift to large plantations throughout the Deep South profitable? the textile mill the mechanical reaper the cotton gin t

number 6 please i need help this formula may help y=mx+b

what is 25/1000 reduced

Two objects attract each other gravitationally with a force of 3.0×10−10N when they are 0.45m apart. Their total mass is 4.0kg . find the individual masses

what is the square root of 112

Which letter represents the direction of the centripetal force?

4) Using complete sentences, explain how to find the average rate of change for f(x) from x = 4 to x = 7.

What Is 89.519 Rounded To The Nearest Whole Number