Algebra_Review - Algebra Review 1 Difference of squares 2...

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Algebra Review  1. Difference of squares:  2 2 ( )( ) a b a b a b - = + - 2. Squared binomials:    2 2 2 2 2 2 ( ) 2 ( ) 2 a b a ab b a b a ab b + = + + - = - + 3. Quadratic equation in standard form and the quadratic formula                2 2 4 0 2 b b ac ax bx c x a - - + + = = 4. Solving quadratic equations using three methods:             a.      Sight factoring  b.     Completing the square (the same method used to “prove” the quadratic formula)  c.      Quadratic formula 5. Two "standard" triangles (45 ° -45 ° -90 °  and 30 ° -60 ° -90 °                   6. The Pythagorean Theorem for right triangles,  2 2 2 a b c + = 7. Plotting parabolas:   2 ( ) ( ) f x a x h k = - +         ‘a’ positive:  concave upward (vertex is at a minimum)         ‘a’ negative:  concave downward (vertex is at a maximum)          ‘h’ negative:  moves vertex to the right          ‘h’ positive:  moves vertex to the left          ‘k’ positive:  moves vertex up          ‘k’ negative:  moves vertex down 8. Straight Lines: a) Slope-Intercept form:  y
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