Question

8n²-4n-180 =0 expressions​

Answer 1

Step-by-step explanation:

8n^2 - 4n - 180 = 0

4 ( 2n^2 - n - 45 ) = 0

2n^2 - n - 45 = 0

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

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

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

2n + 9 = 0 OR n - 5 = 0

n = - 9 / 2 n = 5

Answer 2

n=9/2,n=5

Step-by-step explanation:

Take common 4 in equation

$2n^2-n-45=0$

Now middle term splitting

$(2n^2-10n)+(9n-45)=0\\2n(n-5)+9(n-5)\\(2n+9)(n-5)\\2n+9=0\\2n=-9\\n=\frac{-9}{2}\\or\\n-5=0\\n=5$