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Need help with math exam question (lower paper)

explain why 5x (to the power of 3) + 2x (to the power of 2) = 20 What is the solution between x = 1.4 and x = 1.5 Thanks in advance :)
Question asked by: chrisowen

Asked on: 26 Jan 2011

5x^3 + 2x^2 = 20

The ^ sign is the one standardly used to indicate a power where you can't do superscript on something like this for mathematical equations.

With this sort of question you can solve it by trial and error: you just try a number for x, put it into the equation, and keep on going until you get the answer.

Whether you can re-arrange the equation to something simpler I'm not sure.

By: knowitall
Replied at: 26 Jan 2011
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Comments and other answers:

Thanks knowitall, that helps but what's the answer?!
By: chrisowen

Date of comment: Thu, Jan 27th 2011

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