Question

c) Simplify the given expression and then find its value, when x = (-1) : 4x - {(7x2 - 4x) – (1 - x)}

Answer 1

Answer:

$= 4x - (7 {x}^{2} - 4x) - (1 - x) \\ = 4x - 7 {x}^{2} + 4x - 1 + x \\ = 9x - 1 - 7 {x}^{2} \\ = - 9 - 1 - 7 \\ = - 17$

Answer 2

Step-by-step explanation:

4x-14-4x-1-x

x= -14-4

X= -28