1.) what number should be added to the expression x2+2x to change it into a perfect square trinomial? a.) 1 b.) 2 c.) 4 d.) 9 2.) what number should be added to the expression x2+10x to change it into a perfect square trinomial? a.) 5 b.) 10 c.) 25 d.) 100 3.) what are the solutions to the equation? b2−10b=39 enter your answers in the boxes. b = and 4.) which statement describes the first step to solve the equation by completing the square? 2x2+12x=32 a.) multiply both sides of the equation by 16 . b.) add 6 to each side of the equation. c.) multiply both sides of the equation by 12 . d.) add 36 to each side of the equation. 5.) what are the solutions to the equation? 3x2+6x=45 enter your answers in the boxes. x = and