H haliebre New member Joined Apr 4, 2006 Messages 43 Apr 4, 2006 #1 A few more questions. I need to solve x2 -4<= 0 Write the solutino in interval notation. I also need help in solving this using the elimination method. 5x-27=6 y=5/2x-4
A few more questions. I need to solve x2 -4<= 0 Write the solutino in interval notation. I also need help in solving this using the elimination method. 5x-27=6 y=5/2x-4
pka Elite Member Joined Jan 29, 2005 Messages 11,978 Apr 4, 2006 #2 \(\displaystyle x^2 - 4 \le 0\quad \Rightarrow \quad (x + 2)(x - 2) \le 0\quad \Rightarrow \quad - 2 \le x \le 2\quad \Rightarrow \quad x \in [ - 2,2].\)
\(\displaystyle x^2 - 4 \le 0\quad \Rightarrow \quad (x + 2)(x - 2) \le 0\quad \Rightarrow \quad - 2 \le x \le 2\quad \Rightarrow \quad x \in [ - 2,2].\)
H haliebre New member Joined Apr 4, 2006 Messages 43 Apr 4, 2006 #3 thanks. It has been ten years since I took algebra so I am still trying to relearn a lot of information.
thanks. It has been ten years since I took algebra so I am still trying to relearn a lot of information.
