Q.3
The factors of 121 p2 - 49 q2 are
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121 p² - 49 q²
rewrite 121p² - 49p² as ( 11 p ) ² - ( 7p ) ² . the difference of squares can be factored using the rule : a² - b² = ( a - b ) ( a + b )
( 11p - 7q ) ( 11p + 7q )
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