March 29, 2015

Homework Help: algrebra 2

Posted by lisa on Thursday, November 2, 2006 at 11:19pm.

it is called completing the square
here is the equation 4x^2-4x+1=9 if anyone can help me please do okay i really need ot understand this

Move the numbers to the other side.
4x^2 -4x = 9-1
4x^2 -4x = 8
Now factor out 4 to make things easier.
x^2 -x =2 but remember we have all of that multiplied by 4.
The completed square goes where I place the Y.
x^2 - x +Y = 2 and to keep everything equal we must add Y to the right side, also.
x^2 - x + Y = 2 + Y
To determine what number completes the square, take 1/2 the x term and square it. 1/2 of 1 is 1/2 and 1/2 squared is 1/4. Now add 1/4 to both sides like this.
x^2 - x + 1/4 = 2 + 1/4 = 2.25
Now factor the left side. It is a perfect square now so it will be
(x - 1/2)^2 = 2.25
Now take the square root of both sides and solve for x. I hope this helps.

solving polynomial long division

Answer this Question

First Name:
School Subject:

Related Questions

math dealing with varibles - solve this problem S-46=14 is it... a)34 b)31 c)32 ...
Algebra - Which of the following statements is true? A. Any quadratic equation ...
Math - A magic square is a square of numbers with each row, column, and diagonal...
math, algebra - Problem: A formula for a football player's rushing average r ...
Completing the square - Please show the procedure for answering this quadratic ...
algebra - I cant get this one nither I tried like 4 times to get right answer. ...
Algebra - I don't understand how to do this problems: Solve for the variable r, ...
Algrebra 1 - x2(squared)-12=-x solve by completing the square
math,help,algebra I - I need help can someone help me get unstuck and let me ...
math/algebra - I have a triangle one side = 3 side 2 = square root5 - square ...