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urp:poly
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| Both sides previous revision Previous revision Next revision | Previous revision | ||
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urp:poly [2022-01-07] nerf_herder [Completing the square] |
urp:poly [2022-01-07] (current) nerf_herder [Completing the square] |
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| That becomes (x + b/2a)² = -c/a + (b/2a)² | That becomes (x + b/2a)² = -c/a + (b/2a)² | ||
| 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 |
| + | (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) | ||
| === Method 2 === | === Method 2 === | ||
urp/poly.1641539016.txt.gz · Last modified: 2022-01-07 by nerf_herder
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