Advertisements
Advertisements
Question
Find the value of the following expression, when x = −1:
2x2 − x − 2
Sum
Advertisements
Solution
2x2 - x - 2
= 2 (-1) × (-1) - (-1) - 2
= 2 + 1 - 2
= 1
shaalaa.com
Is there an error in this question or solution?
Chapter 10: Algebraic Expressions - EXERCISE 10.2 [Page 168]
APPEARS IN
RELATED QUESTIONS
If p = -2, find the value of −3p2 + 4p + 7.
If p = -2, find the value of -2p3 - 3p2 + 4p + 7.
Find the value of the following expression, when x = -1:
x2 + 2x + 1
Simplify this expression and find its value if x = 3, a = −1, b = −2.
10 - 3b - 4 - 5b
Simplify this expression and find its value if x = 3, a = −1, b = −2.
2a - 2b - 4 - 5 + a
What should be the value of a if the value of 2x2 + x − a equals to 5, when x = 0?
If x = 2 and y = − 4, evaluate:
5x2y
If x = 2 and y = − 4, evaluate:
8x2
Evaluate -p2 when p = 5.
Evaluate -p2 when p = 5.
