Lesson: Applications of Quadratic Equations

In this lesson, we will learn how to solve word problems by forming and solving quadratic equations.

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Q1:

Find the positive number whose square is equal to two times the number.

Q2:

The difference between the square of Daniel’s age now and 5 times his age 2 years ago is 160. How old is Daniel now?

Q3:

At which values of does the graph of cross the -axis?

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