Question

3 a² - B² ( para a= -2 e B= -7

Answer 1

=3 (-2)²-(-7)²
= 3.4-49
=12-49
=-37
 
                                                                                                           

Answer 2

3 a² - b² | a = -2 e b = -7

3 × (-2)² - (-7)²
3 × 4 - 49
12 - 49 = -37