CAN ANYONE HELP ME STEP BY STEP IN THIS QUESTION
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Answer:
6a
Step-by-step explanation:
9 a^2 - 81 b^2
= ( 3a )^2 - ( 9b )^2
a^2 - b^2 = ( a + b ) ( a - b ) { Identity }
= ( 3a + 9b ) ( 3a - 9b )
The factors of 9 a^2 - 81 b^2 is 3a + 9b, 3a - 9b.
Sum of the factors of 9 a^2 - 81 b^2 is,
3a + 9b + 3a - 9b
= 3a + 3a + 9b - 9b
= 6a
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