Common Math Mistakes!
From Huben's Wiki
(Created page with "Every year I see large numbers of easy mistakes to avoid. ; You can only cancel FACTORS of numerators and denominators. ; Parentheses mean that you need to perform operations o...") |
m (moved Common Algebra Mistakes! to Common Math Mistakes!) |
||
| Line 7: | Line 7: | ||
; Don't forget to FOIL when you square an expression! | ; Don't forget to FOIL when you square an expression! | ||
| − | : (a + b)<sup>2</sup> = a<sup>2</sup> + 2ab + b<sup>2</sup> | + | : (a + b)<sup>2</sup> = a<sup>2</sup> + 2ab + b<sup>2</sup><br>(sqrt(x) +3)<sup>2</sup> != x + 9 |
