Question

resolva as raizes das equações x2-x-6=0​

Answer 1

Resposta:

a = 1

b = 1

c = -6

x = - b +- \sqrt{b ^{2} - 4 ac }/ 2a−b+−

b

2

−4ac

/2a

x = -1 +- \sqrt{(1) ^{2} - 4*1*(-6) } / 2*1−1+−

(1)

2

−4∗1∗(−6)

/2∗1

x = -1 +- \sqrt{25} / 2−1+−

25

/2

x = -1 +- 5 / 2−1+−5/2

x' = -1 + 5 / 2−1+5/2 = 2

x'' = - 1 - 5 / 2−1−5/2 = -3