All Categories
Alerts
Wishlist
Cart
Sign In
Categories
Current Affairs & GK
Current Affairs
Show All Current Affairs & GK
General Aptitude
Arithmetic Aptitude
Data Interpretation
Show All General Aptitude
General Knowledge
Basic General Knowledge
General Science
Show All General Knowledge
Medical Science
Anatomy
Biochemical Engineering
Biochemistry
Biotechnology
Microbiology
Show All Medical Science
Technical
Database
Digital Electronics
Electronics
Networking
Show All Technical
Verbal and Reasoning
Logical Reasoning
Verbal Ability
Verbal Reasoning
Show All Verbal and Reasoning
›
For the equation x^2 + 2x + k = 0 to have one root equal to 1, what is the value
For the equation x^2 + 2x + k = 0 to have one root equal to 1, what is the value of k?
Expand All
Collapse All
Practice Questions
1 question
Q1
For the equation x^2 + 2x + k = 0 to have one root equal to 1, what is the value of k?
0
1
2
3
Show Solution
Copy
Substituting x = 1 into the equation gives 1^2 + 2*1 + k = 0 => 1 + 2 + k = 0 => k = -3.
Questions & Step-by-step Solutions
1 item
Q
Q: For the equation x^2 + 2x + k = 0 to have one root equal to 1, what is the value of k?
Solution:
Substituting x = 1 into the equation gives 1^2 + 2*1 + k = 0 => 1 + 2 + k = 0 => k = -3.
Steps: 8
Show Steps
Step 1: Start with the equation x^2 + 2x + k = 0.
Step 2: We know that one root of the equation is 1, so we will substitute x = 1 into the equation.
Step 3: Substitute x = 1 into the equation: 1^2 + 2*1 + k = 0.
Step 4: Calculate 1^2, which is 1.
Step 5: Calculate 2*1, which is 2.
Step 6: Now, the equation looks like this: 1 + 2 + k = 0.
Step 7: Combine 1 and 2 to get 3, so the equation is now 3 + k = 0.
Step 8: To find k, we need to isolate it. Subtract 3 from both sides: k = -3.
Related Questions
F
Find the value of tan(45°).
Question: Find the value of tan(45°).Options: 01undefined√3Correct Answer: 1Solution: tan(45°) = 1...
W
What is the value of 5C2?
Question: What is the value of 5C2?Options: 1020155Correct Answer: 10Solution: 5C2 = 5! / (2!(5-2)!)..
W
What is the derivative of f(x) = x^3 - 3x^2 + 4x - 5?
Question: What is the derivative of f(x) = x^3 - 3x^2 + 4x - 5?Options: 3x^2 - 6x + 43x^2 - 6x2x^2 -..
I
If the coordinates of points A and B are (1, 2) and (3, 4) respectively, what is
Question: If the coordinates of points A and B are (1, 2) and (3, 4) respectively, what is the dista..
F
Find the value of tan(45°) + cot(45°).
Question: Find the value of tan(45°) + cot(45°).Options: 120undefinedCorrect Answer: 2Solution: tan(..
‹
Biology (School & UG)
Chemistry (School & UG)
Civil Engineering
Commerce & Accountancy
Computer Science & IT
Current Affairs & GK
Data Structures & Algorithms
Electrical & Electronics Engineering
English (School)
General Aptitude
General Knowledge
General Knowledge & Current Affairs
Languages & Literature
Law & Legal Studies
Major Competitive Exams
Mathematics (School)
Mechanical Engineering
Medical Science
Physics (School & Undergraduate)
Quantitative Aptitude & Reasoning
Social Science (School)
Technical
Verbal and Reasoning
Vocational & Skill Development
›
Soulshift Feedback
×
On a scale of 0–10, how likely are you to recommend
The Soulshift Academy
?
0
1
2
3
4
5
6
7
8
9
10
Not likely
Very likely
✕
↑
