1. P.4: Solving Equations Algebraically & Graphically Equation- a statement that two algebraic expressions are equal. To solve an equation means to find all the values for the variable that make the equation true. They are called solutions. Solving equations involving fractions- ***Always check for extraneous solutions! Ex 1: Ex 2: Ex 3:

2. Finding Solutions of an Equation Graphically (yes, using your calculator!) Ex 1: Calculator keys: 1)Push “Y = “ 2)Enter equation 3)Push “graph” 4)Use the “zero/root” feature to find the accurate solution (x- intercept) ***A cubic has 3 zero’s/roots. Why does the calculator only show 1 in this example???? Points of Intersection of Two Graphs- -an ordered pair that is a solution of two different equations is called a point of intersection. Ex 1: and.1) Solve each eqn for y. 2) Set eqn’s = 3) Solve for x

3. Graphically…(again, yes…a calculator!) Solving Polynomial Equations Algebraically- 1 st degree- Linear 2 nd degree- Quadratic 3 rd degree- Cubic 4 th degree- Quartic 5 th degree- Quintic Solving quadratics algebraically… 1)Factoring 2)Square Root Principle 3)Completing the Square 4)Quadratic Formula Ex 1: Ex 2:

4. Ex 3: Ex 4: What about… Ex 5: Homework: Pg. 50-52/15, 19, 23, 28, 31, 34, 53, 57, 73, 76, 82, 85, 91, 93, 99, 102, 106, 108 QUIZ FRIDAY!