Question

me ajudem X2 =x+12 ???

Answer 1

x² -x -12 = 0 => a=1, b=-1, c=-12

∆= b² -4ac = (-1)² -4.1 (-12)= 49 =>√∆=7

x =-b±√∆/2a

x =1±7/2.1

x'= 1+7/2 = 8/2 = 4 ✓

x"=1-7/2 = -6/2 = -3 ✓