5. Nissos and Chelita were arguing over a math problem. Nissos was trying to explain to Chelita that she had made a mistake in finding the x-intercepts of the function y= x²-10x+21. "No way!" Chelita exclaimed. "I know how to find x-intercepts! You make the y equal to zero and solve for x. I know I did this right!" Here is Chelita's work: Step 1: x² -10x+21=0, so (x+7)(x+3)=0. Step 2: Therefore, x+7=0 or x+3=0. Step 3: So x=-7 or x=-3. Nissos tried to explain to Chelita that she had done something wrong. What is Chelita's error? Justify and explain your answer completely.
5. Nissos and Chelita were arguing over a math problem. Nissos was trying to explain to Chelita that she had made a mistake in finding the x-intercepts of the function y= x²-10x+21. "No way!" Chelita exclaimed. "I know how to find x-intercepts! You make the y equal to zero and solve for x. I know I did this right!" Here is Chelita's work: Step 1: x² -10x+21=0, so (x+7)(x+3)=0. Step 2: Therefore, x+7=0 or x+3=0. Step 3: So x=-7 or x=-3. Nissos tried to explain to Chelita that she had done something wrong. What is Chelita's error? Justify and explain your answer completely.
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
I need help with number 1-36
![5.
Nissos and Chelita were arguing over a math problem. Nissos
was trying to explain to Chelita that she had made a mistake in
finding the x-intercepts of the function y= x²-10x+21. "No
way!" Chelita exclaimed. "I know how to find x-intercepts! You
make the y equal to zero and solve for x. I know I did this right!"
Here is Chelita's work:
Step 1:
x² -10x+21=0, so (x+7)(x+3)=0.
Step 2: Therefore, x+7=0 or x+3=0.
Step 3: So
x=-7 or x=-3.
Nissos tried to explain to Chelita that she had done something wrong. What is
Chelita's error? Justify and explain your answer completely.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F0c2d1f60-2481-46b6-b554-6dc9ed915f51%2F871093ec-55f5-4afb-a1b3-31d43068589d%2F3vzwneb.jpeg&w=3840&q=75)
Transcribed Image Text:5.
Nissos and Chelita were arguing over a math problem. Nissos
was trying to explain to Chelita that she had made a mistake in
finding the x-intercepts of the function y= x²-10x+21. "No
way!" Chelita exclaimed. "I know how to find x-intercepts! You
make the y equal to zero and solve for x. I know I did this right!"
Here is Chelita's work:
Step 1:
x² -10x+21=0, so (x+7)(x+3)=0.
Step 2: Therefore, x+7=0 or x+3=0.
Step 3: So
x=-7 or x=-3.
Nissos tried to explain to Chelita that she had done something wrong. What is
Chelita's error? Justify and explain your answer completely.
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