Question

factorise using middle term splitting
(a) -m^2-6m+91​

Answer 1

Answer:

thank you for the points

Answer 2

${m}^{2} + 6m - 91 = 0 \\ \\ {m}^{2} + 13m - 7m - 91 = 0 \\ \\ m(m + 13) - 7(m + 13) = 0\\ (m + 13)(m - 7) = 0 \\ \\ m = - 13 \\ m = 7$