in the exam today I had to find the value of x when $\displaystyle x^3 - 19x - 54 = 0$ I lost 10 marks just because i did not know how to do it, is there a general method for it?
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Originally Posted by wopashui in the exam today I had to find the value of x when $\displaystyle x^3 - 19x - 54 = 0$ I lost 10 marks just because i did not know how to do it, is there a general method for it? You can use synthetic division; however, I don't think this thread belongs in Linear and Abstract Algebra.
Originally Posted by wopashui in the exam today I had to find the value of x when $\displaystyle x^3 - 19x - 54 = 0$ I lost 10 marks just because i did not know how to do it, is there a general method for it? It doesn't factorise. You must have been expected to use technology to solve it for you.
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