If x is an even integer, which of the following is an even integer? Pick one.
A) 3x-3  B) x+x^2  C) 5x-3  D) 2x+1  E) 9x-5
Plug in an even integer; in this case 2   (3*2)-3 = 6-3= 
<gadget id="calculator">6-3</gadget>
<output>3</output>
3 Odd   2+2^2= 6 Even   (5*2)-3 = 10 - 3= 
<gadget id="calculator">10 - 3</gadget>
<output>7</output>
7 Odd   (2*2)+1= 4 + 1= 
<gadget id="calculator">4 + 1</gadget>
<output>5</output>
5 Odd   (9*2)-5= 18 - 5= 
<gadget id="calculator">18 - 5</gadget>
<output>13</output>
13 Odd   Answer: x+x^2
<result>B</result>
If x is an even integer, which of the following is an even integer?