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swiftskier96

Help!?!?!?!?!?!? 46. Divide –2x³ + 21x² – 20x – 12 by (x – 3).

  • one year ago
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  1. whpalmer4
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    Dividing polynomials works just like regular long division. Here's an example: x^2 + 6x +9 ------------------------------------- x+5 | x^3 + 11x^2 + 39x +45 - (x^3 + 5x^2) --------------------- 6x^2 + 39x - (6x^2 + 30x) ------------------ 9x + 45 - (9x + 45) ------------- 0 This problem won't come out so neatly, and you'll be left with a remainder at the end. Be sure when you subtract an intermediate product that has - signs in it that you remember to do - ( a - b) = adding -a + b!

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