Question

solve .............


m^+m-20
​

Answer 1

Answer:

${m}^{2} + m - 20 \\ \\ = {m}^{2} + (5 - 4)m - 20 \\ \\ = {m}^{2} + 5m - 4m - 20 \\ \\ = m(m + 5) - 4(m + 5) \\ \\ = (m + 5)(m - 4) \\ \\ either \: m + 5 = 0 \\ \\ = > m = - 5 \\ \\ or \: m - 4 = 0 \\ \\ = > m = 4$

hope it helps uH :)