Question

Find n if 2P(n, 2) + 50 = P(2n, 2).​

Answer 1

Answer:

2P(n,2)+50=P(2n,2)

2*n/n-2+50=2n/2n-2

2n(n-1)+50=2n(2n-1)

2n square -2n+50=4n square-2n

2n square-50= 0

2n square -50= 0

2n square=50

N square=25

N=5