81. Error Analysis Describe and correct the error. The vertex of the parabola given by f(x) = 2(x + 2)2 + 3 X is (2, 3). 82. Error Analysis Describe and correct the error. The graph of the parabola given by y= -x'+ 4-4 X opens upward. 89. (0, 8). (5, 8) 90. (2, -3), (5, -3)