Question

2) Resolva as equações completas do 2º grau

a) x2 - 5x + 6 = 0
b) x2 - 2x - 8 = 0
c) x2 + x - 12 = 0​

Answer 1

resposta:

a) x2 - 5x + 6 = 0

2x - 5x + 6 =0

-3x + 6 = 0

-3x = -6

x = 2

b) x2 - 2x + 8 = 0

8 = 0

x = 0

c) x2 + x - 12 = 0

2x + x - 12 = 0

3x - 12 = 0

3x = 12

x = 4