Question

expand (1+2) whole square
in two methods

Answer 1

Answer:

Method - 1:-

• Using Identities

$\sf \to {1}^{2} + 2(2 \times 1) + {2}^{2}$

$\sf \to1 + 2 \times 2 + 4$

$\sf \to9$

Method - 2:-

• Squaring it after adding

$\sf {(1 + 2)}^{2}$

$\sf \to {3}^{2}$

$\sf \to9$

Answer 2

Answer:

(1+2)^2

=> 3^2

=> 9

Step-by-step explanation: