81s^2-16=0
I keep getting all decimals...???
2007-11-05 09:52:15 · 3 answers · asked by higherlovetx 5 in Science & Mathematics ➔ Mathematics
Sorry I forgot to mention I'm trying to find the solution set?????
2007-11-05 09:59:51 · update #1
Yeah, the answer is really decimal.
Here's the solution:
81s^2 - 16 = 0
81s^2 = 16
s^2 = 16/81
s = (16/81)^1/2 or s = √(16/81)
s = ±(4/9) or s = ±(0.44444444)
2007-11-05 13:43:43 · answer #1 · answered by Lucas Vandross 3 · 0⤊ 0⤋
I wonder why they call it a "solution set" these days! This is standard algebra.
If you put the 16 on the other side (by adding 16 to both sides), you get 81s*2=16. Take the square root of both sides, and you get 9s=4. Divide both sides by 9 to get s. That gives s=4/9 as the other fellow said. But that's the math involved. Hope that helps!
It's been, ummmm, nearly 50 years since I studied algebra, so you tickled some old brain cells for me! LOL But choose the other guy's answer because he got to you first. :)
2007-11-05 21:29:50 · answer #2 · answered by Pat G 3 · 0⤊ 0⤋
s = 4/9 = .44444444 . . . 4ever.
2007-11-05 17:56:30 · answer #3 · answered by supastremph 6 · 1⤊ 0⤋