Question

How do you factor completely:-9a2 + 18a - 27

Answer 1

-9a2 + 18a - 27
First divide by -3
-3(3a^2-6a+9)
Source: http://www.mathskey.com/question2answer/

Answer 2

Thank you both a lot!

Answer 3

How do you divide it by 9 or -9

Answer 4

all right start by taking -9 common u'll have
\[-9[a^2-2a+3]\]
now see u have to factor \([a^2-2a+3]\) using
\[x=\frac{-b(+-)\sqrt{ b^2-4ac} }{ 2a }\]
are u familiar with this?

Answer 5

yes thank you so much!

Answer 6

so now only take this equation
\[a^2-2a+3=0\]
so solving it using the above formula u'll have
\[a=\frac{ 2 \pm \sqrt{4-4*3} }{ 2 }\]

Answer 7

now can u do it?

Answer 8

I can. you want me to show you? is that what you are asking?

Answer 9

nope if ure confident its ok ^_^

Answer 10

I am! thanks for the help, I am grateful!

Answer 11

np :) yw!!