MATLAB: Given that the quadratic equation A has real roots show that equation B > = 0

coeffs

Hi all, I am trying to solve the following problem in MATLAB but I cannot make it work. I am new to MATLAB can anyone help me with this?
Given that the quadratic equation
2mx^2 + 2(m + 4)*x + 9 = 0
has real roots, show that
m^2 − 10*m + 16 ≥ 0
The approach i took was:
syms x m
eq2 = m^2 - 10*m + 16
eq1 = 2*m*x^2 + (2*m + 8)*x + 9
c = coeffs(eq1,x)
but i get wrong result at this point instead of
a = 2m ,  b = 2(m + 4),     c = 9
i am getting
c =
[ 9, 2*m + 8, 2*m]
Do you know a better way to solve this type of problems?
Any help would be appreciated.

Best Answer

instead of a = 2m , b = 2(m + 4), c = 9 i am getting ...
How about this instead?
    syms x m
    eq2 = m^2 - 10*m + 16
    eq1 = 2*m*x^2 + (2*m + 8)*x + 9
    C = coeffs(eq1,x)
    a=C(3);
    b=C(2);
    c=C(1);
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