Review for Exam 2 Section 2.3 Quadratic Equations Solving quadratic equations--ax2+bx+c=0 (1) solve by factoring (2) solve by completing the square (do not have to) (3) solve by quadratic formula x =−b± b2− 4ac2a applications Section 2.4 Imaginary numbers Section 2.5 Radical equations, absolute value equations, etc. Section 2.6 Inequalities, absolute value inequalities Section 3.1 Rectangular Coordinate System distance formula: d = x2− x1()2+ y2− y1()2 midpoint formula: x1+x22,y1+y22⎛ ⎝ ⎜ ⎞ ⎠Section 3.2 Graphing graphing circles: x− h()2+ y− k()2= r2 Section 3.3 Lines slope = m =y2− y1x2− x1 equations of lines: (1) y− y1= mx− x1()(2) y= mx+ b know how to leave in general form applications Section 3.4 Functions Finding function values or expressions Example: Given: fx()= x2− 3, find: fa+h()−fa()h Find domain, range, etc....given a graph Find domain given a
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