I am confused about a problem

Josecerecero

New member
Joined
Feb 8, 2006
Messages
6
Hi, I AM HAVEING ALITTLE TROUBLE WITH THIS PROBLEM IT IS,
25y^2-49,I am not sure because do have to find each ones common factor like this 5y-7
mutiply 5y-7
 
G

Guest

Guest
easy

THISD PROM IS EASY THE ANSWER IS (5Y-7)(5Y+7)
 

steve_b

Junior Member
Joined
May 2, 2004
Messages
78
I'm not quite sure what you are asking abut this problem, but

25y^2 - 49

is the difference between two squares, which factors into:

(5y +7)(5y - 7)

In general:

(a^2 - b^2) = (a + b)(a - b)

Hope that helps...

Steve
 

Josecerecero

New member
Joined
Feb 8, 2006
Messages
6
Thanks Steve

I really appricate it
 
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