Question

Por meio da Fórmula de bhaskara determine as raizes de cada equação

Answer 1

c) x^2 – 8x + 16 = 0

a = 1

b = -8

c = 16

x=(-b±√(b^2-4ac))/2a

x=(-(-8)±√(〖(-8)〗^2-4.1.16))/2.1

x=(8±√(64-64))/2

x=(8±√0)/2

x=(8±0)/2

X = 4

d) x^2 – 13x + 22 = 0

a = 1

b = -13

c = 22

x=(-b±√(b^2-4ac))/2a

x=(-(-13)±√(〖(-13)〗^2-4.1.22))/2.1

x=(13±√(169-88))/2

x=(13±√81)/2

x=(13±9)/2

X1 = 13 + 9 / 2  X2 = 13 - 9 / 2  

X1 = 22 / 2 = 11  X2 = 4 / 2 = 2

e) - x^2 + 10x - 25 = 0

a = -1

b = 10

c = -25

x=(-b±√(b^2-4ac))/2a

x=(-(10)±√(〖(10)〗^2-4.(-1).(-25)))/(2.(-1))

x=(-10±√(100-100))/(-2)

x=(-10±√0)/(-2)

x=(-10±0)/(-2)

X = -10 / -2

X = 5

Answer 2

x^2 – 8x + 16 = 0

a = 1

b = -8

c = 16

x=(-b±√(b^2-4ac))/2a

x=(-(-8)±√(〖(-8)〗^2-4.1.16))/2.1

x=(8±√(64-64))/2

x=(8±√0)/2

x=(8±0)/2

X = 4