Question

equacao de 2 grau sendo x^2-7x+10=0

Answer 1

x² - 7x + 10 = 0

a = 1; b = -7; c = 10

x = [- b ± √(b² - 4ac)] / 2a
x = [- (-7) ± √([-7]² - 4 · 1 · 10)] / 2 · 1
x = [7 ± √(49 - 40)] / 2
x = [7 ± √9] / 2
x = [7 ± 3] / 2
x' = [7 + 3] / 2 = 10 / 2 = 5
x'' = [7 - 3] / 2 = 4 / 2 = 2

Espero ter ajudado. Valeu!

Answer 2

$x^{2} -7x+10=0$⇒
Δ=$(-7) ^{2} -4.1.10$⇒
Δ=9
$x'= \frac{7+3}{2} =5$
⇒$x''= \frac{7-3}{2} =2$ S= {2,5}