Solving by Factoring ![]() ![]() |
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EXPLANATIONS for x2 -4x - 12
![]() The x intercepts are (6) and (-2). The symmetry axis is the line x = 2, with 2 being the midpoint between the intercepts. |
Concept Check: The symmetry axis for the function y= 3x2+18x is the sum of the x intercepts divided by 2, therefore: