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If (t=5), what is the value of (t^2-4t+6)?
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Answer and explanation
Correct answer: 11
Substituting t=5 gives t^2-4t+6=5^2-4(5)+6=25-20+6=11. Therefore, 11 is the correct answer. The value 9 may result from incorrectly omitting the final +6. Exam tip: substitute the value first, then follow the order of powers, multiplication, and addition/subtraction.
Frequently asked questions
What is the correct answer to this question?
11
Why is this the correct answer?
Substituting t=5 gives t^2-4t+6=5^2-4(5)+6=25-20+6=11. Therefore, 11 is the correct answer. The value 9 may result from incorrectly omitting the final +6. Exam tip: substitute the value first, then follow the order of powers, multiplication, and addition/subtraction.
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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