DE y''-5y-14=0

Differential Equation  y'' - 5y - 14 = 0 을 풀어라

Step 1: r² - 5r - 14 = 0

Step 2: (r+2)(r-7) = 0. So, r = -2 or r = 7

Step 3: y = c₁e^-2x + c₂e^7x