factor:
(a-b)^2 - (c-d)^2
8 answers
(a - b - c + d)(a- b + c - D)
how did you get that??
[ (a-b) - (c-d) ] - [ (a-b) + (c-d) ]
[ a - b - c + d ] [ a - b + c - d ]
[ a - b - c + d ] [ a - b + c - d ]
Wolfram Alpha ^_^
remember - -d = + d
LOL, no need for wolfram !
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 :$
i don't get it :$
That is exactly what we got
x y = y x the order is just reversed
x y = y x the order is just reversed