I've just seen the following question on a past paper:(adsbygoogle = window.adsbygoogle || []).push({});

"Explain why 5x^{3}+ 2x^{2}+ x = 20 has a solution between x = 1.4 and x = 1.5. Show all your calculations."

In order to answer this question, is it sufficient to simply work out the equation twice gving x the 2 values stated in the question?

I have done that and the 2 solution are:

19.04 (if x = 1.4)

22.875 (if x = 1.5)

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# Homework Help: Alegra - trial and error

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