Which condition is necessary for an expression in one variable to be a quadratic expression?
Advertisement
Answer and explanation
Correct answer: The coefficient of \(x^2\) is non-zero
A quadratic expression has highest power 2, so the coefficient of \(x^2\) must be non-zero. The \(x\)-term and constant may be zero. Exam tip: identify the highest non-zero power first.
Frequently asked questions
What is the correct answer to this question?
The coefficient of \(x^2\) is non-zero
Why is this the correct answer?
A quadratic expression has highest power 2, so the coefficient of \(x^2\) must be non-zero. The \(x\)-term and constant may be zero. Exam tip: identify the highest non-zero power first.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Exploring Algebraic Identities. Topic: Quadratic expressions.
Advertisement