Question

(x-3-2i)(x+3+2i)

Answer 1

Distribute and combine like terms. Remember that i^2=-1

Answer 2

yah, but im lazy :)

Answer 3

It's not that long...it will be done faster and you can enjoy doing something else if you just..do..it. :)

Answer 4

the full question is givin that 3+2i is one root of the equation x^3+Ax^2+b=0 where a and b are real numbers find all the roots of the equations

Answer 5

Ah, I see. Have fun!

Answer 6

thanks, i enjoy math but its getting late

Answer 7

x^2 - 5 - 12i

Answer 8

@JoannaBlackwelder @harryherzberg no you don't need to distribute

Answer 9

you can use the identity \((a+b)(a-b)\equiv a^2-b^2\)

Answer 10

You still have to distribute using that method, just later on.

Answer 11

It is fewer steps, though.