You can't, Windows 8 is an Operating system, not a spreadsheet application.
the two popular version's of windows in 2012 windows 8 and 7
The answer is 8
The two numbers that multiply to -140 and add up to -8 are 7 and -20. When you multiply them, 7 × -20 equals -140, and when you add them, 7 + (-20) equals -8.
2+4
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The two numbers you are looking for are 8 and 15. When you multiply them, 8 × 15 equals 120, and when you add them, 8 + 15 equals 23. However, there's an error in the conditions provided since no two numbers can multiply to 120 and add to 43.
38 and 8
-92
7*8 = 56
-8 and -8
1 x 8, 2 x 4.
8