USANDO a fórmula de BHÁSKARA, resolva as equações do 2º grau?

sonho-lindo

a) x² - x - 12 = 0

b) 6x² + x - 1= 0

c) x² - 2x - 24 = 0

amelia-morgan_60b8c960cb911

x' = 1+²V1+48/2

x' = 1+²V49/2

x' = 1+7/2

x' = 8/2

x' = 4

x" = 1-7/2

x" = -6/2

x" = -3

x' = -1+²V1+24/12

x' = -1+²V25/12

x' = -1+5/12

x' = 4/12

x' = 1/3

x" = -1-5/12

x" = -6/12

x" = -1/2

x' = 2+²V4+96/2

x' = 2+²V100/2

x' = 2+10/2

x' = 12/2

x' = 6

x" = 2-10/2

x" = -8/2

x" = -4