SOLUTION: Given the quadratic function f(x) = -2x2 - 12x - 10 a. Use “completing the squares” to convert the quadratic function into vertex form b. State the vertex c. Find the x- a

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Question 1064208: Given the quadratic function f(x) = -2x2 - 12x - 10
a. Use “completing the squares” to convert the quadratic function into vertex form
b. State the vertex
c. Find the x- and y-intercepts
d. Graph the function
Found 3 solutions by josgarithmetic, ikleyn, MathTherapy:
Answer by josgarithmetic(39620)   (Show Source): You can put this solution on YOUR website!

The term to complete the square is 9. Do this inside the parentheses.





Vertex is (-3,2).
Vertex is (-3,8).

Find x intercepts using ,;

Find any y intercepts by evaluating .


EDITED GRAPH; FIXED ARITHMETIC MISTAKE
Answer by ikleyn(52798)   (Show Source): You can put this solution on YOUR website!
.
 =  =   =  = .

Vertex is  (-3,8).


Find x-intercepts using   = . They are x= -5 and x= -1.


Find y-intercepts by evaluating  = -10.

Calculations by "josgarithmetic" are wrong.

Plot by "josgarithmetic" is wrong.


Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!

Given the quadratic function f(x) = -2x2 - 12x - 10
a. Use “completing the squares” to convert the quadratic function into vertex form
b. State the vertex
c. Find the x- and y-intercepts
d. Graph the function 
Correct answer: Equation is: , after completing the square, so: 

After using a method your choice, you should get:  

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