Problem 2550. Evaluating a polynomial

Solution 531996

Submitted on 21 Nov 2014

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Ciuban Sebastian on 21 Nov 2014

function y = equation(x)
syms f z
f=3*z^5-z^3+8*z-3
y=subs(f,x)
end

why is not working?

David Verrelli on 16 Mar 2018

syms requires the Symbolic Math Toolbox, which is not available on Cody.

Test	Status	Code Input and Output
1	Fail	%% x = 1; y_correct = 7; assert(isequal(equation(x),y_correct)) Error: Undefined function 'syms' for input arguments of type 'char'.
2	Fail	%% x = 5; y_correct = 9287; assert(isequal(equation(x),y_correct)) Error: Undefined function 'syms' for input arguments of type 'char'.
3	Fail	%% x = 0; y_correct = -3; assert(isequal(equation(x),y_correct)) Error: Undefined function 'syms' for input arguments of type 'char'.
4	Fail	%% x = -3; y_correct = -729; assert(isequal(equation(x),y_correct)) Error: Undefined function 'syms' for input arguments of type 'char'.
5	Fail	%% x = -sqrt(-1); y_correct = -3 - 12*sqrt(-1); assert(isequal(equation(x),y_correct)) Error: Undefined function 'syms' for input arguments of type 'char'.