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5. Lucy solved the quadratic equation: x² -10x +21 = 0 (x+7) (x+3) = 0 Solutions: x = 7 and x= 3 a) Solve the quadratic equation. b) What was Lucy's error(s)? Explain.

5. Lucy solved the quadratic equation: x² -10x +21 = 0 (x+7) (x+3) = 0 Solutions: x = 7 and x= 3 a) Solve the quadratic equation. b) What was Lucy's error(s)? Explain.

Algebra and Trigonometry (6th Edition)
Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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5. Lucy solved the quadratic equation: x² -10x +21 = 0 (x+7) (x+3) = 0 Solutions: x = 7 and x= 3 a) Solve the quadratic equation. b) What was Lucy's error(s)? Explain.
Transcribed Image Text:5. Lucy solved the quadratic equation: x² -10x +21 = 0 (x+7) (x+3) = 0 Solutions: x = 7 and x= 3 a) Solve the quadratic equation. b) What was Lucy's error(s)? Explain.
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