Question

×2+4×+3=0 equacoes do 2 grau

Answer 1

x² + 4x + 3 = 0

delta: b² - 4ac
4² - 4(1)(3)
16 - 12
4

x1 = - b + $\sqrt{4}$ / 2(1)
x1 = - 4 + 2 / 2
x1 = -2/2
x1 = -1

x2 = - b - $\sqrt{4}$ / 2(1)
x2 = - 4 - 2 / 2
x2 = -6/2
x2 = -3