Question

simplyfy the following – (3a+b)³ + (3a–b)

Answer 1

(3a+b)^3 + (3a-b) = (3a+b)((3a+b)^2 - 1^2) = (3a+b)(3a+b)(3a-b)

First step 3a-b taken common and second step a^2-b^2 = (a+b)(a-b)

Answer 2

Answer:

3a²+4ab+b²

Step-by-step explanation:

(a + b) (3a + b)

= 3a²+ab+3ab+b²

= 3a²+4ab+b²

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