How do I solve x^3+3x-5=0?

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How do I solve x^3+3x-5=0?

With out using a calculator

2007-03-07 01:15:20 · 2 answers · asked by Jan A 1 in Science & Mathematics ➔ Mathematics

2 answers

Try replacing x with numbers in this order 1.-1,2,-2,3,-3,... and see which number brings the equation to a zero. With that you now have a factor of the equation which is (x-C) with c being the number that satisfy the equation which is equal to zero. Then you divide the equation with (x-c) and you have a simplified version of the equation.Continue doing this until you factorized it completely.The equation,factorized,ca be solved in a breeze. This technique is applicable to equations of any degree provided that the solution is an integer and is not equal to "i".

2007-03-07 01:28:36 · answer #1 · answered by Allen F. 1 · 0⤊ 1⤋

offers no integral solution.

2007-03-07 01:32:35 · answer #2 · answered by SensitiveMe 2 · 0⤊ 0⤋