Find the value of the following expressions, when x=-1:-x+2
Substitute x=-1in the given expression.
The given expression is -x+2.
=--1+2=1+2=3
Hence, the required final answer is 3.
Question 3 (iv)
Find the value of the following expressions, when x = -1: 2x2−x−2
Question 3 (iii)
Find the value of the following expression, when x = -1: x2+2x+1
Find the value of the following expressions, when x = − 1:
(i) 2x − 7 (ii) − x + 2 (iii) x2 + 2x + 1
(iv) 2x2 − x − 2