Question

Find the value of the following expression when x=-1
2x2 - x-2​

Answer 1

Answer:

put the value of x

2×2-1-2

2×2×2

8

Answer 2

$\huge\fbox\purple{☦ AηSωEя ☦}$

Given,

x = ( - 1 )

so,

$2 {x}^{2} - x - 2 \\ \\ = 2( - 1)^{2} - ( - 1) - 2 \\ \\ = 2 \times 1 + 1 - 2 \\ \\ = 2 + 1 - 2\\ \\ = 3 - 2\\ \\ = 1$

hope this much helps uh ❣