Question

Help me out please, im only typing this much because its making me...

Answer 1

B.
`x^(2) +2x-8`

Explanation:

Here the best method to solve is by substituting the end values of the set in each option , otherwise it will a time consuming problem.

Now substitute x=-4 in all the options

A.
`x^(2) -2x-8`

16+8-8=16>0

so out of option A and C option C is correct.

B.
`x^(2) +2x-8`

16-8-8=0 which means for the values of x>-4
`x^(2) +2x-8`is less than 0

Now substitute x=2 in all the options

A.
`x^(2) -2x-8`

4-4-8=-8<0 . so option A and C both are incorrect.

B.
`x^(2) +2x-8`

4+4-8=0 which means for the values of x<2
`x^(2) +2x-8` is less than 0

Therefore the correct option is B