Using the Calculator to solve an Equation. Bell Ringer 63: 5/10 1.MC: Convert this equation from graphing form to standard form: y = -2 ( x + 3 ) 2 +

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Presentation transcript:

Using the Calculator to solve an Equation

Bell Ringer 63: 5/10 1.MC: Convert this equation from graphing form to standard form: y = -2 ( x + 3 ) [A] y = x 2 + 6x + 12 [B] y = -2x 2 – 15 [C] y = -2x 2 – 12x – 15[D] y = -2x 2 – 12x – 24 2.What value of c would make x x + c a perfect square? 3.Change y = x 2 – 10x + 32 into graphing form by completing the square.

Day 63: May 10 th Objective: Use graphs to validate algebraic solutions and to approximate solutions when no algebraic method is available, and use two different methods to solve one- variable equations graphically. Homework and Classwork Check 5-13 to 5-14 (pgs ) Closure Homework: 5-18 to 5-24 (pgs )

Homework: Lesson 5.1.1

Calculator Functions Finding an Intersection: Press 2 nd and TRACE (CALC) Select 5:interesect When each direction is satisfied, hit ENTER Finding an x-intercept: Press 2 nd and TRACE (CALC) Select 2:zero When each direction is satisfied, hit ENTER

Calculator & Solving Equations Method 1: Enter – Calculator Function – CALC: intersect Intersection x-coordinates! OR Left Side Right Side

Calculator & Solving Equations Method 2: Solve for 0: Enter – Calculator Function – CALC: zero Solve for 0 then find x-intercept(s) x-intercepts! OR