1. 27 +sqrt 297 divided by 9
2. solve and check this problem
sqrt y +18 =4
2007-12-21 09:15:06 · 6 answers · asked by God Bless America!~ 4 in Science & Mathematics ➔ Mathematics
27+sqrt 297/9= 27 + sqrt 9*sqrt 3* sqrt 11 /9= 27 sqrt 33/3
sqrt y +18=4
square the problem
y+18=16
y+18-18=16-18
y=-2
2007-12-21 10:14:05 · answer #1 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋
1)27 +sqrt 297/ 9=
27 + sqrt 9*3*11/ 9=
27 + sqrt 33
2) sqrt y +18 =4, square both sides
y + 18 = 16
y = 16 - 18
y = -2
2007-12-21 09:22:28 · answer #2 · answered by Anonymous · 0⤊ 0⤋
(27 + â297) / 9 = 3 + 1/3â33
â(y + 18) = 4 => y + 18 = 4^2 => y = 16 -- 18 = -- 2
verify it
â(y + 18) = â(--2 + 18) = â16 = 4
2007-12-21 09:33:58 · answer #3 · answered by sv 7 · 0⤊ 0⤋
( 27 + sqrt 297 ) / 9
={ ( 3 ^3 )+ sqrt[ (3) ^2 ( 33)] } / 9
= [( 3 ^3) + 3 sqrt (33)] / 9
= 3 [3^2 + sqrt (33) ] / 9
= [ 9 + sqrt ( 33)] / 3
2 ) sqrt y + 18 = 4
( sqrt y + 18) ^2 = 4 ^2
y + 18 = 16
y = 16 - 18
y = - 2
2007-12-21 09:44:04 · answer #4 · answered by LE THANH TAM 5 · 0⤊ 0⤋
1. (27+ sqrt 297)/9=
(3x9+3x11x9) /9=
3+(3x11)=
3+33=
36
2. sqrt y+18=4
sqrt y + (9x2)=4
sqrt
y+(3x sqrt 2)-(3xsqrt 2)=2-(3xsqrt 2)
y=2.2426405
2007-12-21 10:06:29 · answer #5 · answered by thirtyone_spiders 1 · 0⤊ 0⤋
Is the 1st one (27+sqrt297)/9 or 27+(sqrt297)/9
The 1st way: 3+(sqrt33)/3
2nd: 27+(sqrt33)/3
2: Sqrt y = -14
y=196
does not check
no solution
2007-12-21 09:38:26 · answer #6 · answered by MW 2 · 0⤊ 0⤋