- #1

- 713

- 5

## Main Question or Discussion Point

Hello,

I have the following equation where

[tex]\left\| a x - b\right\|^2=0[/tex]

which can be rewritten as:

[tex](ax-b)\overline{(ax-b)} = 0 [/tex]

or alternatively:

[tex]|a|^2 |x|^2 - 2\Re\{abx\} + |b|^2 = 0[/tex]

How would you solve this equation for x?

I set [itex]x=r e^{i\theta}[/itex], and tried to find values for

Any hint?

I have the following equation where

*a*and*b*are*complex*constants, and*x*is a complex variable:[tex]\left\| a x - b\right\|^2=0[/tex]

which can be rewritten as:

[tex](ax-b)\overline{(ax-b)} = 0 [/tex]

or alternatively:

[tex]|a|^2 |x|^2 - 2\Re\{abx\} + |b|^2 = 0[/tex]

How would you solve this equation for x?

I set [itex]x=r e^{i\theta}[/itex], and tried to find values for

*r*and θ that satisfy the equation, but it doesn't feel like a straightforward approach.Any hint?

***** Note: *****the title of this thread contains a mistake and I cannot correct it now: I meant to write |ax-b|^{2}