Solution 2.1:3c
From Förberedande kurs i matematik 1
(Difference between revisions)
m (Robot: Automated text replacement (-[[Bild: +[[Image:)) |
m (Lösning 2.1:3c moved to Solution 2.1:3c: Robot: moved page) |
Revision as of 08:35, 9 September 2008
The expression can be rewritten as \displaystyle x^2+2\cdot 3\cdot x+3^2 and then we see that it can be factorized, using the squaring rule \displaystyle x^2+2ax+a^2=(x+a)^2 as
- \displaystyle x^2+6x+9 =x^2+2\cdot 3\cdot x+3^2=(x+3)^2.