Left Side Factored

Question

Factor the left side of the equation... I have no clue how to do this...

 

1) x²-y²=1

 

 

2) y2-x2/4=1

 

 

3) x2-y²/9=1

Answer 1

All these equations have a left side that is of the form

 

a²-b²

 

Use the following relationship to to get the results for your specific equations.

 

(a+b)(a-b)=a²-b²