Question

resolva a equação de 2° grau

3x²+5x+6=0

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Answer 1

Resposta:

3x² - 5x + 2 = 0

Δ = b² - 4ac = (-5)² - 4*3*2 = 25 - 24 -> Δ = 1

x = (-b +- √Δ) : 2a = ( -(-5) +- √1 ) : (2*3) = (5 +- 1) : 6

x1 = (5 + 1) : 6 = 6 : 6 -> x1 = 1

x2 = (5 - 1) : 6 = 4 : 6 -> x2 = 2/3