how do I solve this.... (a+b)squared - (c+d)squared ???

Please help me by giving me the solution.... :) THANKS !!!

Printable View

- Feb 23rd 2006, 05:45 PMchina_88[SOLVED] How do I get to answer this problem ?
how do I solve this.... (a+b)squared - (c+d)squared ???

Please help me by giving me the solution.... :) THANKS !!! - Feb 23rd 2006, 06:15 PMThePerfectHackerQuote:

Originally Posted by**china_88**

$\displaystyle x^2-y^2=(x+y)(x-y)$

Thus,

$\displaystyle (a+b)^2-(c+d)^2$

Over here $\displaystyle x=a+b,y=c+d$. Thus,

(watch those signs :eek:

$\displaystyle [a+b+(c+d)][(a+b)-(c+d)]$

Thus,

$\displaystyle (a+b+c+d)(a+b-c-d)$.

Q.E.D.