Question

636 = n ( 5+4n ) ye kese hoga ​

Answer 1

Answer:

$636 = n(5 + 4n) \\ 636 = 5n + 4 {n}^{2} \\ 4 {n}^{2} + 5n - 636 = 0 \\ n = \frac{ - b \frac{ + }{ - } \sqrt{ {b}^{2} - 4ac} }{2a} \\ n = \frac{ - 5 \frac{ + }{ - } \sqrt{25 - 4 \times 4 \times ( - 636)} }{2 \times 4} \\ n = \frac{ - 5 \frac{ + }{ - } \sqrt{25 + 10176} }{8} \\ n = \frac{ - 5 \frac{ + }{ - } \sqrt{10201} }{8} \\ n = \frac{ - 5 \frac{ + }{ - } 101}{8} \\ n = \frac{ - 5 + 101}{8} \: \: or \: \: n = \frac{ - 5 - 101}{8} \\ n = \frac{96}{8} \: \: or \: \: \frac{ - 106}{8} \\ n = 12 \: \: or \: \: 13.25$

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