Question

5n×(5n+1)=300 where n is a positive number​

Answer 1

Answer:

$5n(5n + 1) = 300 \\ n(n + 1) = \frac{300}{5} = 60 \\ {n}^{2} + n - 60 = 0 \\ n = \frac{ - 1 + \sqrt{1 + 240} }{2} \\ =$