April 18, 2015

Homework Help: algebra

Posted by Marissa on Tuesday, August 14, 2007 at 5:51pm.

1)Find the exact solutions to 3x^2=5x-1 using the quadratic formula.
answer=5 plus or minus the square root of 37 over 6

2)Use the discriminant to determine the number and type of roots for the equation 2x^2-7x+9=0
answer=2 complex

3)Identify the vertex,axis of symmetry,and direction of opening for y=1/2(x-8)^2+2

4)Which quadratic function has its vertex at(-2,7)and opens down?

5)Write y=x^2+4x-1 in vertex form

#1, watch your signs
3x^2 - 5x + 1=0
x=(5√(25-12))/6 = (5√(13))/6

#2, ok
#3, vertex is ok, but how can the axis of symmetry be x=-8?? Would it not go through the vertex?? So it is x=9 (always the same as the x of the vertex)

#4 yours opens UP
it should be y = -(x-2)^2+5

#5 no, it should be y=(x+2)^2-5
(why don't you expand your answer, it would not work)

Answer this Question

First Name:
School Subject:

Related Questions

Algebra - 1)Find the exact solutions to 3x^2=5x-1 using the quadratic formula. ...
Algebra II? - I am having trouble with these. I don't even know where to start: ...
math - Here's my question: Determine if each system has one, two, or no ...
algebra 2 - a. find the value of the discriminant b. describe the number and ...
Algebra II - 1)What method(s) would you choose to solve the equation: x2 + 2x - ...
Algebra II - Find the exact solution to 6x^2+1= -8x by using the Quadratic ...
precal - when i do the quadratic equation i get -17 plus or minus the square ...
Algebra 2 Help! - 1.) Simplify the expression. [sqrt3 + 2i][sqrt3 - 2i] 2.) ...
Algebra - Use the quadratic formula to solve the equation. Give exact answers: ...
algebra - I worked the problem out, but could you check my work over and see if ...