Factor completely 49x2 − 81.
Answers
Answered by
0
Answer:
49×2= 98
- 98-81= 17 ans
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Answered by
3
Answer:
( 7x + 9 ) ( 7x - 9 )
Step-by-step explanation:
49x² − 81
= ( 7x )² - 9²
a² - b² = ( a + b ) ( a - b ) Identity/ formula
Here,
a = 7x
b = 9
( 7x )² - 9² = ( 7x + 9 ) ( 7x - 9 )
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