Question

X(x+12)+35=0 как решить?

Answer 1

x(x + 12) + 35 = 0
x² + 12x + 35 = 0
D = 12² - 4 · 1 · 35 = 144 - 140 = 4; √4 = 2
x₁ = (-12 + 2)/(2 · 1) = -5
x₂ = (-12 - 2)/(2 · 1) = -7