This question is asking me to find the maximum y-value on the graph of y=f(x). f(x)=-x^2 + 2x+5
The maximum y-value is y=?

Question

This question is asking me to find the maximum y-value on the graph of y=f(x).  f(x)=-x^2 + 2x+5
The maximum y-value is y=?

jennychan12 · Answer

are you in calculus?

anonymous · Answer

Please help me with this problem.  The eqution is to help me find the maximum y-value on the graph of y=f(x).  f(x)= -x^2 + 2x+5.  The maximum y-value is y=?  Please help me

jennychan12 · Answer

sorry i just wanna know if you're in calculus cuz if u are, there's an easier way to find the maximum.

anonymous · Answer

No algerbra 1.  This is my last class to get my associate degree.  I am so scared.  I am not good at math.  How are you?

jennychan12 · Answer

it's ok.
f(x) = ax^2+bx+c
f(x)= -x^2 + 2x+5
so.. 
a=-1, b=2 and c=5
use x= -b/2a 
after you find what x equals, plug in into the equation to find the y (f(x)) value.

anonymous · Answer

Jenny Chan can you help please

jennychan12 · Answer

i did?

anonymous · Answer

I got 25.  Is that right

jennychan12 · Answer

check your math.
i got 6

anonymous · Answer

I really need help with this.  I am no good at math and at this point so confused can anyone help me solve my previous question.  I need the maximum y-value on the graph of y=f(x).  f(x)=-x^2+2x+5.  What is the maxzimum y-value.  The answer 6 is coming up wrong

anonymous · Answer

Jenny it is telling me the answer is incorrect????

jennychan12 · Answer

your answer (25) is wrong. it's supposed to be 6

anonymous · Answer

I see what I did wrong.  I did not put a - in front of the x.  Thank you

jennychan12 · Answer

no probs