Finding approximate real solution to a equation

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Vinit Nagda
Vinit Nagda 2021-9-22
评论： Vinit Nagda 2021-9-22
Can anyone please help me, how to find the approximate real solution to the following polynomial:
syms x
eqn=0.0941*x^3+0.1926*x-1500;
I used solve and simplify functions, but I don't get a real value.

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采纳的回答

Alan Stevens
Alan Stevens 2021-9-22
You don't need syms here. Try the roots function.
help roots
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Alan Stevens
Alan Stevens 2021-9-22
Ran in:
You could try something like
coeffs = [0.0941, 0, 0.1926, -1500];
r = roots(coeffs);
indicator = find(r==real(r));
disp(r(indicator))
25.1400

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