Question

easy way to find out whether a turnin point is max or min eg: y=2x^2+4x+3 , the turning point is (-1,1)

Answer 1

take the derivative.

Answer 2

See the value of "a"
ax^2 + bx + c = 0

Answer 3

i must be pissin ou off with too many questions

Answer 4

If it's positive, then it will be a happy face, a minimum point.

Answer 5

thanks guys

Answer 6

If it's negative, then there will be a sad face, a min point.

Answer 7

That's the easiest way, which u will unfortunately learn in calculus. The derivatice is:
4x+4, set it equal to 0 and solve for x.
4x+4=0
x=-1
then plug this back into the original to get the y value.

Answer 8

wait if its a poitive parabola doesnt meanit max??

Answer 9

no a positive parabola is min.

Answer 10

okay