Question

Resolva as equações
a)x²+4=200
b)x²+11x=0
c)x²=289
d)2x²-12x=0

Answer 1

Vamos là.

a)

x² + 4 = 200

x² = 196

x1 = -14, x2 = 14

b)

x² + 11x = 0

x*(x + 11) = 0

x1 = 0, x2 = -11

c)

x² = 289

x1 = -17 , x2 = 17

d)

2x² - 12x = 0

x² - 6x = 0

x*(x - 6) = 0

x1 = 0, x2 = 6