Question

Resolver as equações:
a) x² - 7x + 12 = 0
b)x² - 2x +1 = 0
c) x² - 6x + 8 = 0​

Answer 1

a) x1 = 3 , x2 = 4

b) x = 1

c) x1 = 2, x2 = 4

explicação: a) x² - 3x - 4x + 12 =0

Xx (x - 3) - 4x + 12 = 0

Xx (x - 3) - 4 (x - 3) = 0

(x - 3) x (x - 4) = 0

x - 3 = 0

x - 4 = 0

x = 3

x = 4

x1 = 3, x2 = 4

b) (x - 1)² = 0

x - 1 = 0

x = 1

c) x² - 2x - 4x + 8 = 0

Xx (x - 2) - 4x + 8 = 0

Xx ( x - 2) -4 (x - 2) = 0

(x - 2) x (x - 4) = 0

x - 2 = 0

x - 4 = 0

x = 2

x = 4

x1 = 2, x2 = 4