1. Jul 2, 2011

infiniteking1

1. | (2-i)(3+2i)(-5-6i)(-7+3i) / (-4+i) |

2. Relevant equations

3. Im pretty sure im not computing it right but this is what i come up with.

square root of 5* square root of 13* square root of 61* square root of 58 / square root of 17.

2. Jul 2, 2011

Dick

I'm really sure you are computing it right. |a*b|=|a|*|b|, yes? Why do you think it's not right?

3. Jul 2, 2011

infiniteking1

I'm not sure if the value of i by itself is 1 or whether or not to include it when I am finding the square root.

4. Jul 2, 2011

Dick

The absolute value of a+bi where a and b are both real is sqrt(a^2+b^2). It's the length of the hypotenuse of the triangle with real side a and imaginary perpendicular side b in the Argand diagram. It's the pythagorean theorem. |1|=1 and |i|=1. You are doing everything correctly. Trust me.

5. Jul 2, 2011

infiniteking1

Ok, thanks for the help. Making sure but theres nothing more to do to this problem, correct?

6. Jul 3, 2011

Dick

Not really. You could collect the square roots, or you could write it as an approximate decimal. But I don't see any reason to do that.