Answer:
(-1,-9) and (-3,-11) are two pairs whose difference is 8. (-1,-9) and (-3,-11) are two pairs whose difference is 8.
step by step explanation:
subtract and subtract makes addition [- , - = (+) ]
and
addition and subtract makes subtraction = [ + ,- = ( - ) ]
so,
(-1 ) - (-9) = (-1)+ 9
= 8
same with second one
