Question

x(x-1)(2x+3), qual o valor de x

Answer 1

x²-x (2x+3) ⇒ 2x³-3x² - 2x² - 3x ⇒ 2x³ - 5x² - 3x ⇒ x (2x² - 5x - 3) = 0 ⇒ 2x² - 5x -3  ⇒ x= -b +/- √Δ ÷2a ⇒ 5 +/- √25-4.2.(-3)÷2.2 ⇒ 5 +/- √1 ÷ 4 
 x₁ = 0
x₂= 5+1÷4 = 6/4 = 3/2 = 1,5 
x₃ = 5-1/4 = 4/4 = 1