If a(a - 4) = 5 and b(b -4) = 5, where a ≠ b, then a + b = Choose the correct choice from the following choices.
A) −48	B) −4	C) 4	D) 9	E) 48
i.e. if a = -1 then b =5   or if a = 5 then b = -1   But in each case a+b = -1+5= 
<gadget id="calculator">-1+5</gadget>
<output>4</output>
4   Answer: option 4
<result>C</result>
If a(a - 4) = 5 and b(b -4) = 5, where a ≠ b, then a + b =