Factorise 9x²-81
please help me with the doubt don't prank
Answers
Answered by
0
Answer:
Step-by-step explanation:
(3x)^2 - (3)^2 x (3)^2
Answered by
0
Answer:
(3x + 9) (3x - 9)
Step-by-step explanation:
9x²-81
(3x)² - 9²
a² - b² = (a + b) (a - b)
(3x)² - 9² = (3x + 9) (3x - 9)
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