Monday

January 26, 2015

January 26, 2015

Posted by **Anonymous** on Thursday, August 27, 2009 at 11:40am.

- math -
**Reiny**, Thursday, August 27, 2009 at 12:08pmcomplete the square:

y=x2+6x-2

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

= (x+3)^2 - 11

so the vertex is (-3,-11)

or

for y = ax^2 + bx + c, the x value of the vertex is -b/(2a)

sub that back in the original equation to get the y of the vertex.

x of vertex = -6/2 = -3

y = (-3)^2 + 6(-3) - 2 = -11

**Answer this Question**

**Related Questions**

Algebra - Identify the vertex and the axis of symmetry for the graph of y=5(x-2...

heelp math - A graph is constructed iteratively according to the following ...

AlgebraB-2 - 1. What are the coordinates of the vertex of the graph? Is it a ...

Algebra - Write an equation for the translation so the graph has the given ...

pre-calculus - Give the coordinates of the vertex and graph the equation in a ...

Math - y = |x − 4| + 8 Find the x-coordinate of the vertex of the graph. ...

Math - y=-3x^2+6x-2 Sketch the graph of the given porabola and state the ...

algebra II - Can you please help me with the these problems. 8.Write an equation...

math, algebra,graphs help - THe directions state: (A)Complete the table, (B) ...

Math - y^2=8(x-3) how would you get the coordinates. vertex = 3,0 then what? let...