P5--Section


 * Student Answers

Sean Austin - thanks for the answers. || Student Feedback || Teacher Feedback || note: (-3)^2 || solution is E because the absolute value rule for equals only applies when the absolute value is equal to a positive number. ||
 * 62. True. 2 would be an x-intercept of the graph if it was a solution. Any answer for x in the equation will also be an x-intercept on the graph. ||  || correct ||
 * 63. False. X could also be negative. 3^2 is equal to -3^2. ||  || correct
 * 64. D. You can check by graphing on the calculator. The x-intercepts are 0 and 3. ||  || correct ... can also use factors of zero theorem ||
 * 65. B. To solve x^2 + bx =c by completing the square, add (b/2)^2 to both sides of the equation. ||  || correct ||
 * 66. B. Simply plug the answers into the quadratic equation, and simplify. ||  || correct ||
 * 67. D. Because it is absolute value, you need to set the answer equal to both the positive and negative to get the two possible solutions. ||  || incorrect