2006-08-09 02:04:43 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
(a+b) (a-b) = a²-b²
so y²1/4-9 1/4
2006-08-09 02:08:54 · answer #1 · answered by fred 055 4 · 0⤊ 0⤋
(y1/2-3 1/2)(y1/2+3 1/2) is also the same as (y/2-3.5)(y/2+3.5) so the answer would be {(y^2)/2^2 -3.5y/2 + 3.5y/2 + 3.5^2}, then cancell out -3.5y/2 + 3.5y/2 because that would be equal to 0. then the final answer would be {(y^2)/4 - 12.25}. hope this helps... :)
2006-08-09 09:43:39 · answer #2 · answered by kae 2 · 0⤊ 0⤋
The answer is 0 because both of the brackets contridict each other and cancels each other out. Unless you do mean the first y is a Y and the second is a small letter y. See, you multiply both of them toghter, -3.5*+3.5 will equal 0 (well i think it does, If i am wrong, just go and ask the experts at www.cclub.editboard.com they will help ya out)
2006-08-09 09:25:37 · answer #3 · answered by dogerman 1 · 0⤊ 0⤋
For fred 055
Errrmmmm........... 3.5² is 12.25
Aside from that, you're right.
Doug
2006-08-09 09:21:59 · answer #4 · answered by doug_donaghue 7 · 0⤊ 0⤋