If (x+2) is the HCF of x2 + ax + b and x2 + cx + d , then which one of the following is correct ?  Choices:
A) a + c = b + d	B) 2a + b = 2c + d	C) b + 2c = 2a + d	D) b - 2c = 2a - d	E) None
Answer   If (x+2) is the HCF of x2 + ax + b and x2 + cx + d.   Then, (-2)2 -2a +b = (-2)2 -2c + d   b  + 2= 
<gadget id="calculator"> + 2</gadget>
<output>2</output>
2a + d   b  + 2= 
<gadget id="calculator"> + 2</gadget>
<output>2</output>
2a + dorrect Option: b  + 2= 
<gadget id="calculator"> + 2</gadget>
<output>2</output>
2a + d
<result>C</result>
If (x+2) is the HCF of x2 + ax + b and x2 + cx + d , then which one of the following is correct ?