Question

a²-b² para a= 1 e b=2

Answer 1

Resposta:

$1^{2}-2^{2}$

1-4

-3

Answer 2

${a}^{2} - {b}^{2}$

$= {1}^{2} - {2}^{2}$

$= 1 - 4$

$= ( - 3)$