If a2+b2-4(a+b)= -8,then the value of (a-b) is: A. 4 B. 0 C. 2 D. 8
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2a+2b-4a-4b=-8
-2a-2b=-8
a+b=4
a=4-b
then put value of a in first line then u will find a and b and u can find a-b
-2a-2b=-8
a+b=4
a=4-b
then put value of a in first line then u will find a and b and u can find a-b
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