Question

resolva as seguintes equações do segundo grau ​

Answer 1

Vamos lá.

a) x*(x + 3) = 0

x1 = 0, x2 = -3

b) x² + x = 0

x*(x + 1) = 0

x1 = 0, x2 = -1

c) 2x² - 12x = 0

x² - 6x = 0

x*(x - 6) = 0

x1 = 0, x2 = 6

d) x² - 9 = 0

x² = 9

x1 = 3, x2 = -3

e) 25x² - 100 = 0

x² - 4 = 0

x² = 4

x1 = 2, x2 = -2

f) 2x - x² = 0

x² - 2x = 0

x*(x - 2) = 0

x1 = 0, x2 = 2

g) x² - 3x = 6x

x² - 9x = 0

x*(x - 9) = 0

x1 = 0, x2 = 9

h) x² - 5x = 0

x*(x - 5) = 0

x1 = 0, x2 = 5

i) 2x² - 50 = 0

x² = 25

x1 = 5, x2 = -5