(n / n-3) + n = 7n-18 / n-3
I know the answer is either 3 or 6
I know the answer is either 3 or 6
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Should be shown as :-
n / ( n - 3 ) + n = ( 7n - 18 ) / ( n - 3 )
n + n ² - 3n = 7n - 18
n ² - 9n + 18 = 0
( n - 6 ) ( n - 3 ) = 0
n = 3 , n = 6
n / ( n - 3 ) + n = ( 7n - 18 ) / ( n - 3 )
n + n ² - 3n = 7n - 18
n ² - 9n + 18 = 0
( n - 6 ) ( n - 3 ) = 0
n = 3 , n = 6
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(n / (n-3)) + n = (7n-18) / (n-3)
n + (n/(n-3)) = 7n-18
6n = 18 + (n/(n-3))
-18n² = 18n - 46 + n
18n² + 19n - 46
now fill this in minus b plus or minus root D and then divide all of that by 2a. D = b² - 4 x a x c
so
-19 plus or minus root D divided by 2a which is 36. D is 361 - 4 x 18 x -46= 3673 root D is around 60.6
-19=60.6 is 41.6 divided by 36= 1.1557 other answer is -19-60,6=-79.605 divided by 36 = -2.21.
Thats the correct answer. Are you sure the formula is alright?
I'm an idiot. I forgot to multiply both sides with n-3. But the answer above me is correct XD
n + (n/(n-3)) = 7n-18
6n = 18 + (n/(n-3))
-18n² = 18n - 46 + n
18n² + 19n - 46
now fill this in minus b plus or minus root D and then divide all of that by 2a. D = b² - 4 x a x c
so
-19 plus or minus root D divided by 2a which is 36. D is 361 - 4 x 18 x -46= 3673 root D is around 60.6
-19=60.6 is 41.6 divided by 36= 1.1557 other answer is -19-60,6=-79.605 divided by 36 = -2.21.
Thats the correct answer. Are you sure the formula is alright?
I'm an idiot. I forgot to multiply both sides with n-3. But the answer above me is correct XD