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

Question

hartnn · Answer

have u been taught the concept of derivatives ?

anonymous · Answer

no

hartnn · Answer

then can u plot y= x2 + 2x - 8 ?

anonymous · Answer

i can not

hartnn · Answer

then this question belongs to which topic?
calculus?

anonymous · Answer

algebra

hartnn · Answer

then i can't help,sorry.........i will let @lgbasallote continue....

lgbasallote · Answer

sorry...can't help...i hate math too

anonymous · Answer

ohh

anonymous · Answer

start by factoring

anonymous · Answer

the right side of the equation

anonymous · Answer

then graph the two zeros that you find

anonymous · Answer

i don't know anything

anonymous · Answer

do you know how to factor a trinomial?

anonymous · Answer

if not use the quadratic equation
$$x=\frac{-b \pm \sqrt{b^2-4ac}}{2a}$$

anonymous · Answer

where a, b, and c are found in the trinomial when the trinomial is in the following form:
$$a*x^2+b*x+c$$

anonymous · Answer

The quadratic equation will give you the zeros of this polynomial

anonymous · Answer

Well, this one here is pretty easy. It's quadratic, so it's a parabola. Is the quadratic term negative or positive?  (the x^2 term)

anonymous · Answer

The quadratic term is positive (+1), so the graph opens up. It will have a minimum and the maximum will be unbounded. (Will go on forever). The minimum will be the vertex. The x-value of the vertex can be found via   -b/2a. Plug the result of that back into the original equation to get the corresponding y-value. That will be your minima.