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If (x=0), what is the value of (7x^3-5x^2+2x-9)?
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Answer and explanation
Correct answer: -9
When x=0, the terms 7x^3, -5x^2, and 2x all become 0. Thus, the value of the expression is 0-0+0-9=-9. Zero is only the value of the variable terms; the constant term -9 must also be included. Exam tip: when x=0, only the constant term remains.
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What is the correct answer to this question?
-9
Why is this the correct answer?
When x=0, the terms 7x^3, -5x^2, and 2x all become 0. Thus, the value of the expression is 0-0+0-9=-9. Zero is only the value of the variable terms; the constant term -9 must also be included. Exam tip: when x=0, only the constant term remains.
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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