it doesn't make sense to me, please help
2007-11-04 07:51:20 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Ok
I think the best you can do is
9 (x^2 +2x -1)
Hope that helps.
2007-11-04 08:06:09 · answer #1 · answered by pyz01 7 · 0⤊ 0⤋
9x^2+18x-9
= 9(x^2+2x-1)
= 9(x+1+sqrt(2))(x+1-sqrt(2))
2007-11-04 07:57:06 · answer #2 · answered by ironduke8159 7 · 0⤊ 0⤋
ok, here we go
9x^2+18x=9......get the x's in one place
9x^2+18+81=9+81........get the c value-what you do to one side you have to do to the other...18/2=9^2=81
(x+9)^2=90.....simplify the values and add 9+81
x+9=+- (plus or minus) 3 square root of 10......square root both sides
x =+- (plus or minus) 3 square root of 10, subtract 9 at the end-not in the square root!........subtract 9 from both sides
here you go,
p.s. i am in the 11th grade.....hope it helps
2007-11-04 08:09:55 · answer #3 · answered by Astrophysics 3 · 0⤊ 0⤋
9x^2+18x-9
9(x^2+2x-1)
2007-11-04 07:54:33 · answer #4 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋
9(x^2+2X-1)
9(X-1)(X-1)
9(X-1)^2
2007-11-04 08:49:07 · answer #5 · answered by minioo1 3 · 0⤊ 0⤋