Question

expand the following (1/5a+3b)²​

Answer 1

Step-by-step explanation:

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Answer 2

(1/5a+3b)² = (a+b)²

Let a be 1/5a and b be 3b

(a+b)² = a²+2ab+b²

1/5a² + 2 x 1/5a x 3b + 3b²

1/25a² + 6/5ab + 9b²

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