Question

Find the square of :
(i) 2a + b​

Answer 1

Answer:

(2a+b)²

= (2a)²+2.2a.b+(b²)

= 4a²+4ab+b²

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Answer 2

Answer:

$\sf {(x + y)}^{2} \ \: : {x}^{2} + 2xy + {y}^{2}$

$\sf {(2a + b)}^{2}$

$\sf \to {2a}^{2} + 2(2a \times b) + {b}^{2}$

$\sf \to {4a}^{2} + 2(2ab) + {b}^{2}$

$\sf \to {4a}^{2} + 4ab + {b}^{2}$