Finding the product

A

Abhishekdas

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Mar 9, 2014
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32
[FONT=MathJax_Main]([FONT=MathJax_Main]5[/FONT][FONT=MathJax_Main]−[/FONT][FONT=MathJax_Math-italic]x[/FONT][FONT=MathJax_Math-italic]y[/FONT][FONT=MathJax_Main])[/FONT][FONT=MathJax_Main]([/FONT][FONT=MathJax_Main]3[/FONT][FONT=MathJax_Main]+[/FONT][FONT=MathJax_Math-italic]x[/FONT][FONT=MathJax_Math-italic]y[/FONT][FONT=MathJax_Main])[/FONT][/FONT]
I tried the following,
As we know, [FONT=MathJax_Main]([FONT=MathJax_Math-italic]x[/FONT][FONT=MathJax_Main]+[/FONT][FONT=MathJax_Math-italic]a[/FONT][FONT=MathJax_Main])[/FONT][FONT=MathJax_Main]([/FONT][FONT=MathJax_Math-italic]x[/FONT][FONT=MathJax_Main]+[/FONT][FONT=MathJax_Math-italic]b[/FONT][FONT=MathJax_Main])[/FONT][FONT=MathJax_Main]=[/FONT][FONT=MathJax_Math-italic]x[/FONT][FONT=MathJax_Main]2[/FONT][FONT=MathJax_Main]+[/FONT][FONT=MathJax_Main]([/FONT][FONT=MathJax_Math-italic]a[/FONT][FONT=MathJax_Main]+[/FONT][FONT=MathJax_Math-italic]b[/FONT][FONT=MathJax_Main])[/FONT][FONT=MathJax_Math-italic]x[/FONT][FONT=MathJax_Main]+[/FONT][FONT=MathJax_Math-italic]a[/FONT][FONT=MathJax_Math-italic]b[/FONT][/FONT]
Here [FONT=MathJax_Math-italic]x is [FONT=MathJax_Math-italic]x[/FONT][FONT=MathJax_Math-italic]y[/FONT]. But [FONT=MathJax_Math-italic]x[/FONT][FONT=MathJax_Math-italic]y[/FONT] has two signs[FONT=MathJax_Main]−[/FONT] and [FONT=MathJax_Main]+[/FONT].[/FONT]
How do I solve this.
 
Abhishekdas said:
[FONT=MathJax_Main]([FONT=MathJax_Main]5[/FONT][FONT=MathJax_Main]−[/FONT][FONT=MathJax_Math-italic]x[/FONT][FONT=MathJax_Math-italic]y[/FONT][FONT=MathJax_Main])[/FONT][FONT=MathJax_Main]([/FONT][FONT=MathJax_Main]3[/FONT][FONT=MathJax_Main]+[/FONT][FONT=MathJax_Math-italic]x[/FONT][FONT=MathJax_Math-italic]y[/FONT][FONT=MathJax_Main])[/FONT][/FONT]
I tried the following,
As we know, [FONT=MathJax_Main]([FONT=MathJax_Math-italic]x[/FONT][FONT=MathJax_Main]+[/FONT][FONT=MathJax_Math-italic]a[/FONT][FONT=MathJax_Main])[/FONT][FONT=MathJax_Main]([/FONT][FONT=MathJax_Math-italic]x[/FONT][FONT=MathJax_Main]+[/FONT][FONT=MathJax_Math-italic]b[/FONT][FONT=MathJax_Main])[/FONT][FONT=MathJax_Main]=[/FONT][FONT=MathJax_Math-italic]x[/FONT][FONT=MathJax_Main]2[/FONT][FONT=MathJax_Main]+[/FONT][FONT=MathJax_Main]([/FONT][FONT=MathJax_Math-italic]a[/FONT][FONT=MathJax_Main]+[/FONT][FONT=MathJax_Math-italic]b[/FONT][FONT=MathJax_Main])[/FONT][FONT=MathJax_Math-italic]x[/FONT][FONT=MathJax_Main]+[/FONT][FONT=MathJax_Math-italic]a[/FONT][FONT=MathJax_Math-italic]b[/FONT][/FONT]
Here [FONT=MathJax_Math-italic]x is [FONT=MathJax_Math-italic]x[/FONT][FONT=MathJax_Math-italic]y[/FONT]. But [FONT=MathJax_Math-italic]x[/FONT][FONT=MathJax_Math-italic]y[/FONT] has two signs[FONT=MathJax_Main]−[/FONT] and [FONT=MathJax_Main]+[/FONT].[/FONT]
How do I solve this.
Click to expand...
To learn, in general, how to multiply any pair of polynomials, try here. ;)
 
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