Question

x(x-7)+10=0 qual calculo ?

Answer 1

x²-7x+10=0
a = 1, b = -7, c = 10

∆ = b² - 4.a.c
∆ = (-7)² - 4.1.10
∆ = 49 - 40
∆ = 9

x = (- b ± √∆) / 2.a
x = (-(-7) ± √9) / 2.1
x = (7 ± 3) / 2
x' = (7 + 3) / 2
x' = 10 / 2
x' = 5

x''= (7 - 3) / 2
x'' = 4 / 2
x'' = 2

As raízes são 5 e 2.