Question 523633
 can you simplify this for me, step by step?: {{{ (7n-8m)^2 + (7n+8m)^2 }}}
= {{{49n^2 - 112mn + 64m^2 + 49n^2 + 112mn + 64m^2}}}
= {{{98n^2 + 128m^2}}}
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Is the the same problem?
i have tried using the algebraic  identities. 
{{{ 49n-112nm+64m+49n+112nm+64}}}
= {{{ 98n + 128 }}}