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Grade: 12
        The sum of the product if the ten numbers 1;2;3;4:5.-1.-2.-3.-4.-5  taking two at a time is ??. Pls explain the answer ....
4 years ago

Answers : (1)

Prajwal
28 Points
							
Its -55
As if you multiply ±1 ,±2 .....±5 .And add their product
Like:-
-1+(-4)+(-9)+(-16)+(-25) 
=-1-4-9-16-25=-55
one year ago
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