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Find the largest prime factor of 451^2- 137^2 without using a calculator.

 Apr 9, 2018
 #1
avatar+428 
+1

Remove the squares:

451 - 137 =314 

314 = 2 x 157,

=157 - the largest prime factor, which is the same as the largest factor of the difference of their squares.

 Apr 9, 2018
edited by jakesplace  Apr 9, 2018
 #2
avatar
0

Find the largest prime factor of 451^2- 137^2 without using a calculator.

 

Remove the squares:

451 - 137 =314 

314 = 2 x 157,

=157 - the largest prime factor, which is the same as the largest factor of the difference of their squares.

 Apr 9, 2018
 #3
avatar+428 
0

ok thats your answer

 Apr 9, 2018

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