a^2-8a+12 a.-2,-6 b.2,6 c.-3,-4 d.3,4
I used to be really good at reading people's mind, but lately .....
Let me guess, you are solving
a^2 - 8a + 12 = 0 , and those things after are supposed to be choices of solutions ???
a^2 - 8a + 12 = 0
(a-6)(a-2) = 0
a = 6 or a = 2