Question

a raizes da equação x2+7x+10=0

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.

Answer 2

x² + 7 x + 10 = 0

Δ = b² - 4.a.c

Δ = 7² - 4 . 1 10

Δ = 49 - 40

Δ = 9 ⇒ √ 9 = 3

x = - b + ou - 3/2

x´= -7 + 3 / 2

x´= -4/2

x´= -2

x´´= -7 - 3 / 2

x´´= - 10 / 2

x´´= - 5

S = {-2 ; - 5 }