Question

3) Resolva as equações do segundo grau.

a) x² - 5x + 6 = 0

b) x² - 8x + 12 = 0

c) x² + 2x - 8 = 0

d) x² - 5x + 8 = 0

e) 2x² - 8x + 8 = 0

f) x² - 4x - 5 = 0

g) -x² + x + 12 = 0

i) -x² + 6x - 5 = 0

j) 6x² + x - 1 = 0

k) 3x² - 7x + 2 = 0

Answer 1

a)x1=2 X2=3

b)X1=2 x2=6

c)x1=-4 x2=2

d)x€R/x=(-)

e)x=2

f)x1=-1. x2=5

g)x1=-3 x2=4

i)x1=1. x2=5

j)x1=-1/2=-0,5 x2=1/3=0,33

k)x1=1/3=0,33 x2=2