Question

solve it in expandation form

a^2 + 6a - 91​

Answer 1

Answer:

a^2 +6a-91

=a^2 +13a - 7a - 91

=a(a+13) - 7(a+13)

=(a+13)(a-7)

If the equation is

a^2 +6a-91=0

Then the solution is

a=7 or a= - 13