Asked by sunny

factor:
(a-b)^2 - (c-d)^2
Answered by Lue
(a - b - c + d)(a- b + c - D)
Answered by sunny
how did you get that??
Answered by Damon
[ (a-b) - (c-d) ] - [ (a-b) + (c-d) ]

[ a - b - c + d ] [ a - b + c - d ]
Answered by joe
Wolfram Alpha ^_^
Answered by Damon
remember - -d = + d
Answered by Damon
LOL, no need for wolfram !
Answered by sunny
the answers at the back of the textbook say that the answer is (a-b+c-d)(a-b-c+d)
i don't get it :$
Answered by Damon
That is exactly what we got
x y = y x the order is just reversed
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