Answers

2014-02-28T11:19:25+05:30
I guess you are well aware of the (a^2)-(b^2)=(a+b)(a-b) form.
Similarly put m^2 in place a and put 16 in place of b.
We get,
m^4-256=(m^2+16)(m^2-16)
Again we use the same identity,
But this time we put a=m and b=4
We finally get
m^4-256=(m^2+16)(m+4)(m-4)
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2014-02-28T12:22:40+05:30
(m)^4-(4)^4
(m^2-2^2)(m^2+2^2)
(m-2)(m+2)(m^2+2^2)
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