23
-9 and -4
-40
-36
41
49 (it is an arithmetic series that adds 5 then 7 then 9 then 11 then 13)
3 ± 5.19615i (to 5 dp) where i is the imaginary sq root of -1equivalently, 3 ± sqrt(-27) = 3[1 ± sqrt(-3)]
49
4 and 9
164
It is: -6 and -6
-20
21
0
9
-30
-40
The factor pairs of 36 are (36,1)(18,2)(12,3)(9,4) Even considering their negative counterparts, none of them adds up to -60.
-18 + -18 = -36 -18 x -18 = 324 The two numbers are both -18.