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how to derive a cubic formula. Then divide both sides by a and complete the square. 112 A function s C2ab is called a cubic spline on ab if s is a cubic polynomial s.
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For the case when the polynomial is cubic ie. The following figure shows how to derive the formula for the nth term of a quadratic sequence. X-3x23x12 the roots of that quadratic are-3 or - sqrt 39i 2.
X-3x23x12 the roots of that quadratic are-3 or - sqrt 39i 2.
The solutions of this equation are called roots of the cubic function defined by the left-hand side of the equation. The other two roots real or complex can then be found by polynomial division and the quadratic formula. Dont worry about being unclear. The distinction between the two formulas is in the location of that one minus sign.
