Question

encontre as raizes da função x²-7x+12=0

Answer 1

b2 - 4ac = 49 - 48 = 1

7+/- 1/2  = 4 e 3

Answer 2

a = 1
b = -7
c = 12

Δ = b²-4ac
Δ = (-7)²-4·1·12
Δ = 49-48
Δ = 1

x = -b+ou-√Δ/2a
x = -(-7)+ou-√1/2·1
x = 7+ou-1/2

x' = 7+1/2 
x' = 8/2
x' = 4

x" = 7-1/2
x" = 6/2
x" = 3 

s = {3,4}

As raízes são 3 e 4