Question

x² +7x+10=0 sendo U = IR é

Answer 1

a = 1

b = 7

c = 10

delta = b²-4ac

delta = 7²-4.1.10

delta = 49-40

delta = 9

 

x = (-b+/-\/delta)/2a

x = (-7+/-\/9)/2

x = (-7+/-3)/2

x' = (-7+3)/2 = -4/2 = -2

x" = (-7-3)/2 = -10/2 = -5