Question

determine as raízes das equações
a) x² - 7x + 6 = 0

b) x² - 3x – 28 = 0

c) x² + 12x + 36 = 0

d) 9x² + 2x + 1 = 0

e) x² - 5x +8 = 0

f) x² - x – 6 = 0

g) x² - 14x + 49 = 0​

Answer 1

Resposta:

▲=b^2-4ac

x=-b+-r▲/2a

a....1

b.... -7

c....6

▲=49-4*1*6

....49-24

▲ 25

r 5

x'....7+5=12/2=6

x"....7-5=2/2=1

V={1; 6}