Factorise 9a^2-b^2??

Question

asked Feb 13, 2021 194k views

2 Answers

Leqid · Answer 1 · 2021-02-16T13:19:45+0000

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▹ Answer

3² * a² - b²

▹ Step-by-Step Explanation

9a² - b²

Break down each coefficient and variable:

9 = 3²

a² = a²

b² = b²

Combine everything together:

3² * a² - b²

Hope this helps!

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Ashkan Kazemi · Answer 2 · 2021-02-19T19:28:45+0000

Answer:

Since both terms are perfect squares, factor using the difference of squares formula, a^2-b^2=[a+b][a-b] where a=3a and b=b