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Find the Value of the Following Expressions, When X = − 1: 2x2 − X − 2 - CBSE Class 7 - Mathematics

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Question

Find the value of the following expressions, when x = − 1:

2x2 − x − 2

Solution

2x2 - x - 2 = 2 (-1) × (-1) - (-1) - 2

= 2 + 1 - 2 = 1

  Is there an error in this question or solution?

APPEARS IN

 NCERT Solution for Mathematics for Class 7 (2018 to Current)
Chapter 12: Algebraic Expressions
Ex. 12.30 | Q: 3.4 | Page no. 242
Solution Find the Value of the Following Expressions, When X = − 1: 2x2 − X − 2 Concept: Finding the Value of an Expression.
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