Alg 2 Homework?

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I'm having problems with these certain problems.
I have to figure it out by "completing the square"
x^2+4x-9=0

2006-12-06 12:06:59 · 2 answers · asked by cheer10 2 in Education & Reference ➔ Homework Help

2 answers

mmm
x^2+4x-9=0
or, x^2+4x +4-13=0
or, (x+2)^2-(sqrt(13))^2=0
or, (x+2-sqrt(13))*((x+2+sqrt(13))=0
therefore either,
x=sqrt(13)-2
or
x=-(2+sqrt(13))

2006-12-06 12:08:37 · answer #1 · answered by E=MC^2 4 · 0⤊ 0⤋

well, you have to factor it. um.... wait, i don't think you can factor it. i just tried it, and it doesn't work. sorry, i tried at least... try ajkids.com..

2006-12-06 12:24:56 · answer #2 · answered by Twinkle 1 · 0⤊ 0⤋