text: m to 2 power +m +20? given each quadratic trinomial and list of factor which pair can you use write the factoriztion    explain please m² + m + 20 will not factor with rational factors  the roots to m² + m + 20 = 0 are  m = -1/2 ± √i(79)/2 where i = √ (-1)  so it does factorise in the complex field to m² + m + 20 = (m + 1/2 + √i(79)/2)(m + 1/2 - √i(79)/2)  however m² + m - 20 = (m + 5)(m - 4)