(e) A student writes down the following piece of work, which contains an error in the reasoning. The equation is: Add 19y to each side: y²-19y=0 y² = 19y y = 19 Divide each side By y: (i) Substitute y = 19 into the left-hand side of the equation y²-19y = 0, and explain why this shows that y = 19 is indeed a solution of the equation. (ii) Write out a complete solution of the equation y2 - 19y = 0. (iii) Explain, as if directly to the student, why their solution is inadequate.
(e) A student writes down the following piece of work, which contains an error in the reasoning. The equation is: Add 19y to each side: y²-19y=0 y² = 19y y = 19 Divide each side By y: (i) Substitute y = 19 into the left-hand side of the equation y²-19y = 0, and explain why this shows that y = 19 is indeed a solution of the equation. (ii) Write out a complete solution of the equation y2 - 19y = 0. (iii) Explain, as if directly to the student, why their solution is inadequate.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter9: Quadratic Functions And Equations
Section9.6: Solving Quadratic Equations By Using The Quadratic Formula
Problem 15CYU
Related questions
Question
![(e) A student writes down the following piece of work, which contains an
error in the reasoning.
The equation is:
Add 19y to each side:
y²-19y=0
y² = 19y
y = 19
Divide each side By y:
(i) Substitute y = 19 into the left-hand side of the equation
y²-19y = 0, and explain why this shows that y = 19 is indeed a
solution of the equation.
(ii) Write out a complete solution of the equation y2 - 19y = 0.
(iii) Explain, as if directly to the student, why their solution is
inadequate.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F87fe3c56-cfa6-4b5f-bd6c-9991064c0a1d%2F54726cc1-c258-4fc4-89b1-5f59479451b6%2Fgx3gipv_processed.jpeg&w=3840&q=75)
Transcribed Image Text:(e) A student writes down the following piece of work, which contains an
error in the reasoning.
The equation is:
Add 19y to each side:
y²-19y=0
y² = 19y
y = 19
Divide each side By y:
(i) Substitute y = 19 into the left-hand side of the equation
y²-19y = 0, and explain why this shows that y = 19 is indeed a
solution of the equation.
(ii) Write out a complete solution of the equation y2 - 19y = 0.
(iii) Explain, as if directly to the student, why their solution is
inadequate.
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