If you mean: -4+3+2s = 15 then s = 8
2s2+7s-15 = (2s-3)(s+5) when factored
2s2-s-15 = (2s+5)(s-3)
25 of them
two
2000
310.
-15 is 11111111 and 2s com is 1111 0001
100 2s for the hundreds digit of 200-30010 2s for the tens digit of 220-23010 2s for the ones digit of 200-300________________________________120 '2s'
46.
unknown
1