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urp:poly [2022-01-07]
nerf_herder
urp:poly [2022-01-07]
nerf_herder [Completing the square]
Line 23: Line 23:
   Call d = b/2a: (x + d)² = d² - c/a   Call d = b/2a: (x + d)² = d² - c/a
   Take square roots: x + d = ±√(d² - c/a), and simplify   Take square roots: x + d = ±√(d² - c/a), and simplify
-  (This gives two answers, call it u and v. +  (Solving for x gives two answers, call it u and v. 
    The quadratic equation can then be rewritten as: a(x+u)(x+v) = 0)    The quadratic equation can then be rewritten as: a(x+u)(x+v) = 0)
  
urp/poly.txt · Last modified: 2022-01-07 by nerf_herder