Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
1) if all of the numbers are positive then it's a yes, but if c = 2 a = -50 b = -100, then the answer is way over 24.
2) if we replace the 15 with 16 so we are working with whole numbers we get c = (+ or -) 4. 4*4=16 or -4*4=-16... Both less than 24. Had the answer been closer to 24 then you would have had to worry about the 15 to 16 replacement.
Last edited by typicalgmatter on 14 Nov 2006, 12:54, edited 1 time in total.