Solving quadratics by completing the squares n2 8n 43 5So

Solving quadratics by completing the squares n^2 - 8n - 43 = 5

Solution

n²-8n-43=5

we have to make the complete square,adding 16 to both sides we get

n²-8n+16-43=5+16

(n-4)²=21+43

(n-4)²=64=8²

or n-4=8

n=8+4

n=12