Question

if 4n(n+8)=36?????????​

Answer 1

Answer:

4n^2+32n-36=0

n^2+8n-9=0

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

n(n+9)-1(n+9)=0

(n+9)(n-1)=0

n= -9 or n= 1

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