Writing a quadratic equation program to satisfy a solution. I am very confused help please.

I am trying to write a program in which two solutions, v and w, of the quadratic equation q(x) = ax^2 + bx +c = 0, that satisfies vw = c/a. I want this program to numerically solve such equations given a, b and c. The larger (abs solution) v using this quadratic formula, and the smaller w using w = c/(av), and of course having a provision for a = 0. I want my output to be a vector of solutions showing how many solutions exist. This relatively simple exercise is killing me because I cannot figure it out. Help greatly appreciated with explanation.

[Reelz]

Here is what I have, I am confused on how to set up my parameters correctly.

function [x,y] = rqe2(a,b,c)

x = (-b + sqrt(b^2 - 4 * a * c))/(2*a);

y = (-b - sqrt(b^2 - 4 * a * c))/(2*a);

if vw = c/a;

w = c/(av);

v > w;

a==0;

end

[Reelz]

I get an error when trying to run that says this:

Error: File: rqe2.m Line: 4 Column: 7

The expression to the left of the equals sign is not a valid target for an assignment.

Answer 1

[Walter Roberson]

if vw = c/a;

is not a valid statement. The comparison operator is == rather than =

[Reelz]

ok, it still doesn't work though help please?

[Walter Roberson]

Which error are you getting now?

How you added to your code so that vw is assigned before you attempt to use it?

[Reelz]

When trying to run my code it now says:

>> rqe2

Error using rqe2 (line 2)

Not enough input arguments.

[Walter Roberson]

rqe2(5,9,15)

would run it with a=5,b=9,c=15

[Reelz]

>> rqe2(5,9,15)

??? Error: File: rqe2.m Line: 4 Column: 7

The expression to the left of the equals sign is not a valid target for an

assignment.

Still receiving error!

[Walter Roberson]

Please show your current code.