How do you factor completely #25a^4-49b^2#?
1 Answer
Apr 19, 2017
Explanation:
Note that both
The difference of squares identity can be written:
#A^2-B^2=(A-B)(A+B)#
Using this with
#25a^4-49b^2 = (5a^2)^2-(7b)^2#
#color(white)(25a^4-49b^2) = (5a^2-7b)(5a^2+7b)#
There are no simpler factors.