Solve a, b, c: Step-by-Step Guide

[uzman1243]

Homework Statement

Homework Equations

The Attempt at a Solution

What do I do from here?

 

[AlephZero]

think there is a typo in the question. Where it says "f(x) = 0", x should be a number, the same as in f(4) = 0 and f(-2) = -6.

You did the right thing setting up two equations in a, b, and c. If the question was printed correctly you would be able to get three equations.

If f(x) = 0 for every value of x, then a = b = c = 0, but that doesn't make any sense when the question says f(-2) = -6.

 

[Ray Vickson]

think there is a typo in the question. Where it says "f(x) = 0", x should be a number, the same as in f(4) = 0 and f(-2) = -6.

You did the right thing setting up two equations in a, b, and c. If the question was printed correctly you would be able to get three equations.

If f(x) = 0 for every value of x, then a = b = c = 0, but that doesn't make any sense when the question says f(-2) = -6.

I suspect it means that $f(x_0) = 0$ for some specified value of $x_0$ with $x_0 \neq -2,4$. Then you would, indeed, have three (linear) equations in the three unknowns a,b,c, and you ought to be able to write the solution.

I never read photo attachments of handwritten work, so I will not comment on your efforts. (PF standards actually say you should type out stuff except for unusual circumstances, such as including diagrams from books or whatever.)