Question

2n*n +5n+12 find the value of n

Answer 1

2n*n+5n+12=0
2n*n+(8-3)n+12=0
2n*n+8n-3n+12=0
2n(n+4)-3(n+4)=0
(2n-3)(n+4)=0
1. 2n-3=0
   2n=3
   n=2/3
2.n+4=0
   n=-4