$\displaystyle 2x^3+3x^2+50x+75$ Given: Zero = 5i so logically -5i is a zero. then I multiply the two roots and get 25. then divide Polynomial by 25? If so, how?
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Originally Posted by Isimbot $\displaystyle 2x^3+3x^2+50x+75$ Given: Zero = 5i so logically -5i is a zero. then I multiply the two roots and get 25. then divide Polynomial by 25? If so, how? $\displaystyle (x-5i)(x+5i) = x^2+25$ $\displaystyle \frac{2x^3+3x^2+50x+75}{x^2+25}$ do the long division to find the last linear factor
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