2006-06-06 11:45:55 · 7 answers · asked by sara b 1 in Science & Mathematics ➔ Mathematics
Use FOIL
(3 - 2sqrt3)^2
(3)(3) + (3)(-2sqrt3) + (-3sqrt3)(3) + (-2sqrt3)(-2sqrt3)
= 9 - 6sqrt3 - 6sqrt3 + 4*3
= 21 - 12sqrt(3)
2006-06-06 11:47:42 · answer #1 · answered by MsMath 7 · 1⤊ 0⤋
-3 because 3 squared is 9 and you have to square 2 and the square root of 3 so 2 squared is 4 and square root 3 squared is 3 so you have to multiply 3 times 2 and you get 12 . 9-12=-3
2006-06-06 11:47:43 · answer #2 · answered by jess 2 · 0⤊ 0⤋
I take that to be (3 minus twice the square root of 3) squared.
If so, then the exact answer would be 21-12(square root of 3).
The decimal approximate would be .215390309
Peace out.
If different than what I assumed, explain further. I will "Watch List" and check back.
2006-06-06 11:47:46 · answer #3 · answered by The Grey Pawn 3 · 0⤊ 0⤋
24
2006-06-06 11:49:19 · answer #4 · answered by Anonymous · 0⤊ 0⤋
(3 - 2sqrt3)^2 = 9 - 12sqrt3 + 12 = 21 - 12sqrt3
2006-06-06 12:22:28 · answer #5 · answered by h2 2 · 0⤊ 0⤋
(3 - 2sqrt(3))^2
(3 - sqrt(12))^2
(3 - sqrt(12))(3 - sqrt(12))
9 - 3sqrt(12) - 3sqrt(12) + (sqrt(12))^2
9 - (3 + 3)sqrt(12) + 12
(9 + 12) - 6sqrt(12)
21 - 6sqrt(12)
21 - 6sqrt(4 * 3)
21 - 12sqrt(3)
2006-06-07 07:38:30 · answer #6 · answered by Sherman81 6 · 0⤊ 0⤋
The answer is 1.
2006-06-06 11:47:57 · answer #7 · answered by »SMiLEY« 4 · 0⤊ 0⤋