Hi guys,

I have an equation y = a*b + c*d

The variables are just real numbers. How can I get this equality to hold without multiplying anything together? I have tried taking the log of each side but that doesn't work.

Anyone have any thoughts?

Printable View

- Oct 31st 2012, 12:20 PMsfspitfire23Re-write equation without multiplication
Hi guys,

I have an equation y = a*b + c*d

The variables are just real numbers. How can I get this equality to hold without multiplying anything together? I have tried taking the log of each side but that doesn't work.

Anyone have any thoughts? - Oct 31st 2012, 04:25 PMSorobanRe: Re-write equation without multiplication
Hllo, sfspitfire23!

Are you sure of the wording of the problem?

I don't think it can be done.

Quote:

Rewrite without multiplication: .$\displaystyle y \:= \:ab + cd$

The variables are real numbers.

It might help if we knew whatthis problem came from.*course*

If the variables were natural numbers, the task can be completed.

. . $\displaystyle \text{For example: }\:a\cdot b \;=\;\underbrace{b + b + b + \cdots + b}_{a\text{ terms}} $

But withnumbers . . . I see no way to rewrite$\displaystyle \pi\sqrt{3}$*real*

- Nov 1st 2012, 05:07 AMsfspitfire23Re: Re-write equation without multiplication
Just a linear algebra course. My teacher wants to know whether it can be done. I don't think it can.