Tuesday, March 24, 2009

A2 5.4 Completing the Square Cont'd

Last Nights Home Work

Complete the square: x^2+8x+11

Your finding where the parabola intersects on the x axis. (Solving for the variable)

You will have two answers for X

b/2 is a gift. It is always used to solve. (Add to BOTH sides)

When ever you complete your square you will always have a binomial times its self. (a perfect square)

To Solve: (x+4)^2= 5 (you need to fine the square root of both sides)

SR of x+4= SR of + or - 5
-4 -5
x= -4 + or - SR of 5


www.my.hrw.com (Professor Edward Burger)

Home work: 12-36 even
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3 comments:

  1. ShahirMarch 24, 2009 at 10:32 AM

    u will have to answers for X?????????????????
    u add b/2 two both sides?

    ReplyDelete
  2. ShahirMarch 24, 2009 at 5:27 PM

    *2

    ReplyDelete
  3. Paideia MathMarch 25, 2009 at 4:08 AM

    add (b/2)^2 to both sides...don't forget to multiply that by any factors on the "constant-c" side.

    ReplyDelete

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