Question

determine o conjuto e a soluçao da equaçao x²- x .12 = 0

Answer 1

x² - 12x = 0

x(x-12) = 0

x' = 0

x - 12 = 0
x'' = 12                                 S = { 0 , 12 }              ok

Answer 2

x²- 12x = 0  ==> x(x - 12) = 0  ==> x' = 0 ==> x - 12 = 0 ==> x'' = 12 ==> S = {0,12}