Help me on this question please

number near x^2 is a

number near x is b

and number with no x is c

-5+-1/2

than you have 2 answers

1.

x=-5-1/2

x=-3

2.

x=-5+1/2

x=-2

Hope it helps

answer: .64

step-by-step explanation

set up the formula for standard deviation for this set of numbers, then simplify