### Home > APCALC > Chapter 7 > Lesson 7.2.2 > Problem 7-65

7-65.

Once again, Greta is in a pickle! She is trying to solve the following equation and knows she can use *u*-substitution. Homework Help ✎

Greta thinks if she lets

she can write the equation as a quadratic equation. Show Greta she is correct.

Solve for.

Then solve for.Use your answer to part (a) to solve for

.