A few days ago
Help with Binomials?
Can somebody give me a good site to help me learn some more about them, also i need help with these two problems.
1. -9x^2+12x-4=0
2. x^2=3x
Top 2 Answers
A few days ago
Favorite Answer
www.purplemath.com
is a good site where you can learn algebra from the basics
1. -9x^2 + 12x – 4
To factor this expression, first you have to determine the factors of the first and the last terms (9x^2 and 4)
9x^2 = 3x and 3x
4 = 2 and 2
Then combine them, but you have to consider the sign of 9x^2 and the middle term (12x).
Thus,
(-3x + 2) (3x-2)
-3x + 2 = 0
-3x = -2
x = 2/3
3x -2 = 0
3x = 2
x = 2/3
2. x^2 = 3x
Divide both terms by x (since it is their common factor)
Thus,
x = 3
0
A few days ago
http://en.wikipedia.org/wiki/Binomial
0
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