Question

expandthe following : (2a + b)²​

Answer 1

Answer:

4a²+4ab+b²

Step-by-step explanation:

$(a+b)^{2}$=a²+2ab+b²

(2a + b)²​ = 4a²+4ab+b²

Answer 2

Answer:

4a² + 4ab + b²

Step-by-step explanation:

(2a + b)²​

= (2a + b) (2a + b)

=2a (2a + b)  + b (2a + b)

= 4a² + 2ab + b (2ab)

= 4a² + 2ab + 2ab + b²

= 4a² + 4ab + b²

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