Fector of 8n^2-4n-180=0
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4(2n2-n-45)=0
2n2-n-45=0
By splitting the middle term
2n2-10n+9n-45=0
2n(n-5)+9(n-5)=0
(2n+9)(n-5)=0
Therefore n=5 or n=-9/2
2n2-n-45=0
By splitting the middle term
2n2-10n+9n-45=0
2n(n-5)+9(n-5)=0
(2n+9)(n-5)=0
Therefore n=5 or n=-9/2
Answered by
19
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