Question

Simplify:
a2 + (3a-b) (3a + b + b2)

solve this question
if you know

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Answer 1

Final result :

10a2 + 3ab2 - b3 - b2

Answer 2

Answer:

$(3a - b)b2 + 9a {}^{2} - b {}^{2} + a {}^{2}$

$9a {}^{2} + 3b2a - b {}^{2} - b2b + a2$

this two answer I have ok ARMYBLINK...