Lisa solves a quadratic equation as shown below. 6 = x? + 2x - 8 6 = (x + 4)(x- 2) 6 = x + 4 and6 = x-2 x = 2 and x = 8 %3D %3D Which of these best describes the error in Lisa's work? A. The last line should be x = B. The 6 should have been subtracted from both 6 and x? + 2x - 8 before factoring. C. Only (x + 4) or (x- 2) should be set equal to 6, not both factors. D. The 6,2, and -8 should be simplified to 3, 1, and -4 before factoring. 2 or x = 8.
Lisa solves a quadratic equation as shown below. 6 = x? + 2x - 8 6 = (x + 4)(x- 2) 6 = x + 4 and6 = x-2 x = 2 and x = 8 %3D %3D Which of these best describes the error in Lisa's work? A. The last line should be x = B. The 6 should have been subtracted from both 6 and x? + 2x - 8 before factoring. C. Only (x + 4) or (x- 2) should be set equal to 6, not both factors. D. The 6,2, and -8 should be simplified to 3, 1, and -4 before factoring. 2 or x = 8.
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,...
Related questions
Question
![Lisa solves a quadratic equation as shown below.
6 = x2 + 2x - 8
6 = (x + 4)(x – 2)
6 = x+ 4 and6 = x – 2
x = 2 and x = 8
%3D
%3D
Which of these best describes the error in Lisa's work?
A. The last line should be x = 2 or x = 8.
B. The 6 should have been subtracted from both 6 and x² + 2x – 8 before factoring.
C. Only (x + 4) or (x – 2) should be set equal to 6, not both factors.
D. The 6, 2, and -8 should be simplified to 3, 1, and -4 before factoring.
%3D](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd6ed1179-a9a5-4d20-9992-1da8c32fc14c%2F32169979-3535-455c-9a6f-b12d4b58b422%2Fecmtcm8_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Lisa solves a quadratic equation as shown below.
6 = x2 + 2x - 8
6 = (x + 4)(x – 2)
6 = x+ 4 and6 = x – 2
x = 2 and x = 8
%3D
%3D
Which of these best describes the error in Lisa's work?
A. The last line should be x = 2 or x = 8.
B. The 6 should have been subtracted from both 6 and x² + 2x – 8 before factoring.
C. Only (x + 4) or (x – 2) should be set equal to 6, not both factors.
D. The 6, 2, and -8 should be simplified to 3, 1, and -4 before factoring.
%3D
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