# Algebra 2

1.What is the vertex from the equation?
Y=x^2+12x=4

2. Use the quadratic formula to solve the equation.
x^2-7x-6=0

3.simplify the expression

(-2/)(8/)

1. 👍
2. 👎
3. 👁
1. Y= x^2+12x=4 ????
I think maybe
y = x^2 + 12 x + 4 ????
x^2 + 12 x = y-4
x^2 + 12 x + (12/2)^2 = y - 4 + 36
(x+6)^2 = y+32

1. 👍
2. 👎
2. x^2-7x-6=0
a = 1
b = -7
c = -6
x = [ 7 +/- sqrt {49 -(4)(-7)(-6) } ] /2
= [ 7 +/- sqrt {49 -168 } ] /2
= [ 7 +/- sqrt {-119 } ] /2
are you sure that was not +6 = c ?

1. 👍
2. 👎
3. -1/4 ????

1. 👍
2. 👎

## Similar Questions

1. ### geometry

M is the midpoint of segment AB, AM=2x+4 and AB=12x+4. What is the value of MB? Show your work for credit.

2. ### mathematics

f(x) = 4x^2 − 7x − 15 Part A: What are the x-intercepts of the graph of f(x)? Show your work. Part B: Is the vertex of the graph of f(x) going to be a maximum or minimum? What are the coordinates of the vertex? Justify your

3. ### college algebra

determine the quadratic function f whose graph is given. the vertex is (1,-3) y intercept is -2 please show work so i can see how this is done, thank you!

4. ### maths

how do i find out the the equation of the line of symmetry for f(x)=ax^2+bx+c ? please explain it do me thanks! The line of symmetry runs through the vertex. so the x of the vertex is -b/(2a) and the equation of the line of

1. ### Math

Write the equation in vertex form: y= -3x^2+12x+15

2. ### Algebra 2 (Math)

What is the vertex form of the equation? y = -x^2 + 12x - 4. I have no clue how to do this.

3. ### Math(Reiny Could You Help?)

The graph of the function g(x) has the same shape and direction of opening as the graph of f(x)= 3(x-2)^2+9. The graph of g(x) has a vertex that is 2 units to the right and 5 units down from the vertex of the graph of f(x). A.)

4. ### Algebra2

What is the vertex form of the equation? Show steps y=-x^2+12x-4

1. ### Math

Enter your answer and show all the steps that you use to solve this problem in the space provided. The two triangles above are similar. A. Find X using the ratio of the sides 12 CM + 16 cm. X over 20 equals 12/16. Show your work.

2. ### algebra

what is an equation of a parobola with the given vertex and focus? vertex(5,4) and focus(8,4) Can someone show me the steps to get the equation please?

3. ### pre cal

What is the center of the conic whose equation is x^2 + 2y^2 - 6x + 8y = 0 2.Which one of the following equations represents a hyperbola? (5 points) A) 3x^2 + y^2 + 12x - 7 = 0 B) 3x^2 + 3y^2 + 12x - 7 = 0 C) 3x^2 + y + 12x - 7 =

4. ### Algebra

For the given quadratic equation convert into vertex form, find the vertex, and find the value for x = 6. Show your work. y = -2x2 + 2x +2 -(1/2)y=x^2-x-1 (-1/2)y+1=x^2-x (-1/2)y+1=(x-1/2)^2-14 (-1/2)y=(x-1/2)^2-5/4