Factor polynomial $$ -u^{2}+49 $$
Answer
$$ -u^{2}+49 = ( -u+7 )( u+7 ) $$
Explanation
Rewrite $ -u^{2}+49 $ as:
$$ -u^{2}+49 = 49 -x^2 = (7)^2 - (u)^2 $$Now we can apply the difference of squares formula.
$$ I^2 - II^2 = (I - II)(I + II) $$After putting $ I = 7 $ and $ II = u $ , we have:
$$ -u^{2}+49 = (7)^2 - (u)^2 = ( -u+7 ) ( u+7 ) $$This page was created using
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