If (k=4), what is the value of (k^2-2k+3)?
Answer and explanation
Correct answer: 11
Given k = 4, substitute 4 for k in the expression: 4² − 2(4) + 3 = 16 − 8 + 3 = 11. Therefore, the correct answer is 11. The value 9 may result if the final +3 is mistakenly omitted. Exam tip: substitute the value first, then apply powers, multiplication, and addition/subtraction in order.
Frequently asked questions
What is the correct answer to this question?
11
Why is this the correct answer?
Given k = 4, substitute 4 for k in the expression: 4² − 2(4) + 3 = 16 − 8 + 3 = 11. Therefore, the correct answer is 11. The value 9 may result if the final +3 is mistakenly omitted. Exam tip: substitute the value first, then apply powers, multiplication, and addition/subtraction in order.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Introduction to Polynomials. Topic: Algebraic expressions.
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