Question

Quadratic equation
7m^{2} +4m-20=0

Answer 1

Answer:

$m = \frac{10}{7} \: or \: - 2$

Step-by-step explanation:

$7{m}^{2} + 4m - 20 = 0 \\ 7 {m}^{2} + 14m - 10m - 20 = 0 \\ 7m(m + 2) - 10(m + 2) = 0 \\ (7m - 10)(m + 2) = 0 \\ 7 m - 10 = 0 \: or \: m + 2 = 0 \\ m = \frac{10}{7} \: or \: m = - 2$