Question

please help
$2n {}^{2} - n - 45 = 0$

Answer 1

2n^2-10n+9n-45=0
2n(n-5)+9(n-5)=0
(n-5)(2n+9)=0
n=5,-9/2
is your answer

Answer 2

Hey !
Here is your answer !!
__________________


2n2 - n + 45 = 0

2n2 - 10n + 9n + 45 = 0

2n ( n - 5 ) + 9 ( n - 5 ) = 0

( 2n + 9 ) ( n - 5 ) = 0

n = 5 or n = - 9 / 2


Hope it helps !!