QUADRATIC FUNCTION REVIEW
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- Hollie Harrison
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1 Objective: Students will be able to (SWBAT) use complex numbers in identities and equations, in order to (IOT) solve quadratic equations with real coefficients using various strategies (i.e. square roots, completing the square, and the quadratic formula.) Standards: MGSE9-12.N.CN.7 Solve Quadratics. Solve quadratic equations in one variable that have complex solutions. MGSE9-12.A.REI.4B Solve by inspection. Solve quadratic equations by inspection (e.g., for! " = $%), taking square roots, factoring, completing the square, and the quadratic formula, as appropriate to the initial form of the equation (limit to real number solutions).
2 Bell Ringer: 1. Determine the sum of 5 3$ and 7 + 8$. 2. Write an expression, in simplest terms, that is equivalent to ($ ) + *$ +, -$.+, where a, b, and c are real numbers and $ = 1.
3 Linear and exponential functions are used throughout mathematics and science due to their simplicity and applicability. Quadratic functions comprise another very important category of functions. You studied these extensively in GSE Algebra I, but we will review many of their important characteristics in this unit.
4 Exercise #1: Without the use of your calculator, evaluate each of the following quadratic functions for the specified input values. Recall that, according to the formal Order of Operations, exponent evaluation should always come first.
5 Graphs of quadratic functions form what are known as parabolas. The simplest quadratic function, and one that you should be very familiar with, is reviewed in the next exercise.
6 Exercise #2: Consider the simplest of all quadratic functions! = # $. (a) Create a table of values to plot this function over the domain interval 3 # 3. (b) Sketch a graph of this function on the grid to the right.
7 Exercise #2: Consider the simplest of all quadratic functions! = # $. (c) State the coordinates of the turning point of this parabola. (d) State the equation of this parabola s axis of symmetry. (e) Over what interval is this function increasing?
8 All quadratic functions that have unlimited domains (domains that consist of the set of all real numbers) have turning points and an axis of symmetry. It is important to be able to sketch a parabola using your graphing calculator to generate a table of values.
9 Exercise #3: Consider the quadratic function! " = " % + 6" + 5. (a) Using a TABLE on your graphing calculator, determine the turning point of this function. (b) What is the range of this quadratic? (c) Graph this function on the grid to the right.
10 Exercise #3: Consider the quadratic function! " = " % + 6" + 5. (c) Why does this parabola open downward as opposed to ) = " % which opened upward? (e) Between what two consecutive integers does the larger solution to the equation " % + 6" + 5 = 0 lie? Show this point on your graph.
11 Exercise #4: A sketch of the quadratic function! = # $ 11# 26 is shown below marked with points at its intercepts and its turning point. Using tables or a graph on your calculator, determine the coordinates for each of the points. The x-intercepts: A B (Zeroes) The y-intercept: The turning point: D C Over what interval is this function positive?
12 Academic Agenda: Complete the Quadratic Function Review Assignment. Closure: Applications - Question # 8 Physics students were modeling the height of a ball once it was dropped from the roof of a 25 story building. The students found that the height in feet, h, of the ball above the ground as a function of the number of seconds, t, since it was dropped was given by... Homework: Review class notes and finish the Quadratic Function Review Assignment.
13 Closure: Applications - Question # 8 Physics students were modeling the height of a ball once it was dropped from the roof of a 25 story building. The students found that the height in feet, h, of the ball above the ground as a function of the number of seconds, t, since it was dropped was given by h " = " ). From what height was the ball dropped? To the nearest tenth of a second, determine the time at which the ball hits the ground. Provide evidence from a table to support your answer or solve this algebraically if you recall how to.
1. Without the use of your calculator, evaluate each of the following quadratic functions for the specified input values. (c) ( )
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Let's look at some higher order equations (cubic and quartic) that can also be solved by factoring.
GSE Advanced Algebra Polynomial Functions Polynomial Functions Zeros of Polynomial Function Let's look at some higher order equations (cubic and quartic) that can also be solved by factoring. In the video,
Lake Elsinore Unified School District Pacing Guide & Benchmark Assessment Schedule Algebra 1 Essentials
1.0 Students identify and use the arithmetic properties of subsets of integers, including closure properties for the four basic arithmetic operations where applicable: 1.1 Students use properties of numbers