Posted by **Jake** on Thursday, April 22, 2010 at 8:19pm.

what is the y value of the vertex f(x)=x^2+6x+5 I have an answer of 4 this is important because I come up with -4 and I believe the answer to this is 4

- college algebra -
**Reiny**, Thursday, April 22, 2010 at 9:50pm
we could complete the square

f(x)=x^2+6x+5

= x^2 + 6x + 9 - 9 + 5

= (x+3)^2 - 4

so the vertex is (-3,-4), so you were right

short-cut way:

the x of the vertex is -b/(2a) = -6/2 = -3

f(-3) = 9 - 15 + 5 = -4

## Answer This Question

## Related Questions

- college algebra - find the vertex f(x)=3x^2-6x+8 I have an answer of -1 and 17 I...
- college algebra - what is the x value of the vertex f(x)=x^2+6x+5 my answer is -...
- college algebra - find the vertex of f(x)=3x^2-6x+8 i have an answer of (1,-5) ...
- college algebra - find the vertex of f(x)=3x^2-6x+8 i have an answer of (1,-5) ...
- Algebra - Write an equation for the translation so the graph has the given ...
- algebra - 1)Find the exact solutions to 3x^2=5x-1 using the quadratic formula. ...
- college algebra - if y=kx/square root of w find k when y=4 x=12 and w =4 I have...
- Troy - Can someone check my answers for the following problems. Simplify. Assume...
- math-college algebra - y-3=1/2(x-6) "finding the value of a variable" x=2 I know...
- Algebra - How do you get the vertex of this absolute value? y = -2 |4x - 1| + 16...

More Related Questions