Question

1) a²-3=2) b²-2c²=3) -12x²+13=​

Answer 1

Объяснение:

$y = a {}^{2} - 3$

Answer 2

It seems like you've provided three different mathematical expressions. Could you please clarify what you would like to do with these expressions? Are you looking for solutions, simplifications, or some other kind of information related to these equations?