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Problem 47563. Find a real root of a quintic function

Solution 3761858

Submitted on 21 Nov 2020 by ChrisR
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Test Suite

Test Status Code Input and Output
1   Pass
coeffs = [6 8 7 9 12 467]; candidateX = quintic(coeffs); assert(isreal(candidateX)) assert(abs(sum(coeffs.*(candidateX.^(5:-1:0)))-0)<0.0001)
2   Pass
coeffs = [4 6 7 8 2 1]; candidateX = quintic(coeffs); assert(isreal(candidateX)) assert(abs(sum(coeffs.*(candidateX.^(5:-1:0)))-0)<0.0001)
3   Pass
for idx = 1:10 coeffs = randi([1 50],1,6); candidateX = quintic(coeffs); assert(isreal(candidateX)) assert(abs(sum(coeffs.*(candidateX.^(5:-1:0)))-0)<0.0001) end

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