25/l (2) - 49/m (2)
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Answer:
( 5 / l + 7 / l )( 5 / l - 7 l )
Step-by-step explanation:
25 / l² - 49 / m²
= > ( 5 / l )² - ( 7 / l )²
= > ( 5 / l + 7 / l )( 5 / l - 7 l )
FORMULAS :
a² - b² = ( a + b )( a - b )
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