Question

simplify and find the value of 4x+x-2x²+x-1 when x = -1

Answer 1

4x + x - 2x² + x - 1 
= 6x - 2x² - 1
x = - 1
6 * (- 1) -2 * (- 1)² - 1
- 6 - 2 * 1 - 1
- 9
The answer is - 9.

Answer 2

Answer:

- 9

Step-by-step explanation:

Given expression is

$4x + x - 2x^{2} + x - 1$

First of all we need to simplify this expression

$4x + x - 2x^{2} + x - 1$

$- 2x^{2} + 6x - 1$

Now taking (-) common fron each terms

$- (2x^{2} - 6x + 1)$

Given, when x = - 1

$-[2(-1)^{2} - 6(-1) + 1]$

= - [ 2 + 6 +1 ]

= - 9 (Answer)