Question

3 x 2 - 15x + 12 = 0
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Answer 1

Resposta: x=6/5

Explicação passo a passo:

3 x 2 - 15x + 12 = 0

6+12-15x=0

18=15x

x=18/15

x=6/5

Answer 2

3x² - 15x + 12 = 0

a = 3

b = - 15

c = 12

Δ = b² - 4ac

Δ = (- 15)² - 4.3.12

Δ = 225 - 144

Δ = 81

x = - b ± √Δ / 2a

x = - (- 15) ± √81 / 2.3

x = 15 ± 9 / 6

x' = 15 + 9 / 6

x' = 24 / 6

x' = 4

x'' = 15 - 9 / 6

x'' = 6 / 6

x'' = 1

S = {1, 4}