Question

calcule as raízes de cada equação ​

Answer 1

∆ = b²-4ac = 1² -4.2.(-1)= 1 +8=9 => √∆=3

x = -b±√∆/2a

x = -1±3/2.2

x'= -1+3/4 = 2/4 = 1/2 ✓

x"= -1-3/4 = -4/4 = -1 ✓

S: { -1 , 1/2 }