Question

expand (1+2) WHOLE SQUARE

Answer 1

Answer:

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

$\sf \to1 + 4 + 4$

$\sf \to9$

Answer 2

= (1+2)*2

= 1+4+2(2)

= 1+4+4

= 9

HOPE IT WILL HELP U....