Determine whether the graph of y = x2 + 2x − 8 has a maximum or minimum point, then find the maximum or minimum value.

Question

cwrw238 · Answer

as the coefficient of x is positive it has a minimum

do you know calculus?

anonymous · Answer

no

cwrw238 · Answer

oh ok
we need to convert to the form

(x - a)^2 + b    where the mimimum value will be  b

cwrw238 · Answer

y = x^2 + 2x − 8 

= ( x + 1)^ 2 - 1 - 8

= (x + 1)^2 - 9

giving a minimum value of -9

cwrw238 · Answer

cwrw238 · Answer

have you any more questions?

anonymous · Answer

Maximum; (-1, -9) 

 Minimum; (-1, -9) 

 Maximum; (-9, -1) 

 Minimum; (-9, -1)

cwrw238 · Answer

what you have there is the coordinates of the minimum value
which occurs when x+ 1 = 0  or x = -1

the correct option is the second one