Question

solve the quadratic equetion 5m^+5m-1=0 using the formula method

Answer 1

$5 {m}^{2} + 5m - 1 = 0 \\ m = \frac{ - 5 + - \sqrt{ {5}^{2} - 4 \times 5 \times ( - 1)} }{2 \times 5} \\ = \frac{ - 5 + - \sqrt{25 + 20} }{10} = \frac{ - 5 + - \sqrt{45} }{10} \\ = \frac{ - 5 + - 3 \sqrt{5} }{10}$