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Vertex means the lowest point?

or the highest pt

the minimum or maximum point..
maximum in this case

so it will be (-b/2a, -D/4a)

or you can just apply d/dx

-2x + 5 = 0
x = 5/2

can we differentiate it?

the problem is im getting 49/4 when x=5/2 and my book says the answer is 29/4... no differentiation

so it will be (-b/2a, -D/4a).how?

hmm...-(5/2)^2 + 25/2 + 6
= -25/4+25/2+6
= 25/4 + 6
=49/4, you're right!

y=-(5/2)^2+5(5/2)+6
y = -25/4 + 25/2 +6......... yup

See: do you know differentiation?

ya very well.

-D/4a?how?

See: did u get y i differentiated?

plz tell me the reasion?

ok when we differentiate, we get the eqn of the slopes of that eqn on respective pts

why we want to know slope?

tell me what you know about derivative at a pt?

i have done intermediate level

ok. its the limiting secant to the graph, the tangent!

bec of tangent we differentiate ya?

ok thanks amogh

So you understand why we equate the slope to 0?

actually iam not intouch.

hmm...np was i clear enough?

thanks alot amogh

LOL, I'm askin you did u understood wat i said now?

or i was too fast or slow?

u was splended amogh

Determine the vertex of the given equation.
y = x2 + 9? im Haveing trouble.

x^2