x^2 - 25
__________

2x^2 + 7x - 15

thanks...

:)

x^2 - 25
__________

2x^2 + 7x - 15

Expand top line:-

(x + 5) (x - 5)
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Expand bottom line

2x^2 + 7x - 15
(2x - 3 ) (x + 5)
___________________________________

Eliminate the ( x + 5) from the both new
answers and you are left with:-

x - 5
------
2x -3