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Exercises Roots and quadratic equations

Example 10.28 from Elementary Algebra, 10.3 Solve Quadratic Equations Using the Quadratic Formula

Solve Quadratic Equations Using the Quadratic Formula: example 10.28

Solve $2 x^{2} + 9 x - 5 = 0$ by using the Quadratic Formula.

Work it out on paper first. Then open the solution one step at a time, and stop as soon as you can finish on your own.

Solution

Your turn

The book's Try It right after this example: same idea, new numbers. Only the answer is given.

Solve $3 y^{2} - 5 y + 2 = 0$ by using the Quadratic Formula.

How did it go?

PreviousSolve Quadratic Equations by Completing the Square: example 10.27 Next Solve Quadratic Equations Using the Quadratic Formula: example 10.29

From Elementary Algebra (1st edition) by OpenStax (Rice University), section 10.3, licensed under CC BY 4.0. Original at openstax.org. We split the solution into steps; the words, numbers and figures are the book's. OpenStax doesn't endorse this site.