Question

Resolva as equações de segundo grau:
A) x²- 4x - 5 = 0
B) x²- 7x = 0
C) x²- 7x + 10 = 0

Answer 1

A)1 - 4 x 1 - 5 = 0
- 4 = - 5 + 1
x = 4
-----
4
x = 1

B)1 -7 x 1 = 0
- 7 = 1
x = 1
----
7
x = 0.14

C)1 - 7 x 1 + 10 = 0
- 7 = 10 + 1
x = 11
-----
7
x = 1.5