MATH/CMSC 206 - Introduction to Matlab
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Answers to Self-Test
1. We are about to use the variables x and y in some formulas -- declare them as "symbolic".
syms x y
2. Write a MATLAB command that will find the solutions to the equation x^2 - x = 7.
solve(x^2 - x - 7)
ans = 1/2 - 29^(1/2)/2 29^(1/2)/2 + 1/2
3. Use MATLAB to find solutions to the system of equations consisting of: 2x + 3y = 60 and -x = 2y + 20
[x y] = solve(2 * x + 3 * y - 60, x + 2 * y + 20)
x = 180 y = -100