Answer:
9a² - b²
Step-by-step explanation:
(3a+b)(3a-b)
*use FOIL(first, outer, inner, last) method
=9a² - 3ab + 3ab -b²
=9a² - b²
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Answer:
9a² - b²
Step-by-step explanation:
(3a+b)(3a-b)
*use FOIL(first, outer, inner, last) method
=9a² - 3ab + 3ab -b²
=9a² - b²