Question

x2-12x+20 igual a 0
resposta pra agora

Answer 1

Resposta:

- x² + 12x - 20 = 0 (-1)

x² - 12x + 20 = 0

a = 1, b = -12, c = 20

▲ = b² - 4ac

▲ = ( - 12 )² - 4 •1.20

▲ = 144 - 80

▲ = 64

x = -b ± √A / 2a

x=-(-12) ± √64/2.1

x = 12 +8/2

x' = 12 + 8/2 = 20/2 = 10

x" = 12-8/2 = 4/2 = 2

S = {2, 10}

Espero ter ajudado :