Solve each equation by using the Quadratic Formula. Round to the nearest tenth if necessary. 21. 5x. 2. + 21x = â18. SOLUTION: Write the equation in...
9-5 Solving Quadratic Equations by Using the Quadratic Formula Solve each equation by using the Quadratic Formula. Round to the nearest tenth if necessary. 2
21. 5x + 21x = −18 SOLUTION: Write the equation in standard form.
For this equation, a = 5, b = 21, and c = 18.
The solutions are
and –3.
2
25. 10x = −7x + 6 SOLUTION: Write the equation in standard form.
For this equation, a = 10, b = 7, and c = –6.
eSolutions Manual - Powered by Cognero
Page 1
The solutions are Equations and –3. by Using the Quadratic Formula 9-5 Solving Quadratic 2
25. 10x = −7x + 6 SOLUTION: Write the equation in standard form.
For this equation, a = 10, b = 7, and c = –6.
The solutions are 0.5 and –1.2. Solve each equation. State which method you used. 2
31. x − 3x = 10 SOLUTION: Solve by factoring. Write the equation in standard form.
