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45 times 8 is 360.
It's the number u multiply with. Example: 45x8 45 is the mulitcand
(x + 1)10 = 1 + 10x + 45x2 + 120x3 + 210x4 + 252x5 + 210x6 + 120x7 + 45x8 + 10x9 + x10 The coefficient of xr is 10!/[r!*(10-r)!] or 10Cr