Problem 178 of 7
Find the missing coefficient in ax^2-10x+8=0 given that x=2 is a solution.
Using a hint is okay. It just tells the trainer to give you a little more review.
Hidden until you reveal it.
substitute root or use factor relationships.
Hidden until you reveal it.
One coefficient must be unknown and one root must be supplied.
Enter your answer
Your answer is equivalent to the expected form.
Walkthrough
Full solution stays hidden until you ask for it.
1. Substitute the given root into the quadratic.
2. Solve the resulting linear equation for the missing coefficient.
3. Check by substituting the root back into the completed equation.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Using the root as the coefficient without substitution.