Ms. Stoll's Blog

Acc. Math I: January 30th - February 3rd

Monday: Today we reviewed for your unit test tomorrow

Tuesday: TEST over complex numbers and solving quadratic equations

Wednesay: Review of solving linear inequalities

Thursday: Solving quadratic inequalities

Friday: Review solving absolute value equations and inequalities

Answers to the unit review

Here are answers to the review worksheet.

Download Quadratic Equations & Complex Numbers Test Review ANSWERS

Work for Friday, Jan. 27th

Today in class you converted among the forms of quadratic functions. You converted from vertex to standard form, from intercept to standard form, and we also converted from standard to intercept form by factoring as well as from standard to vertex form by completing the square. Converting TO standard form is covered on the test, but converting FROM standard form to the other forms will not be on the test.

Here is a comprehensive review of this unit. I will try to post answers later. We will be working on review on Monday, then the unit test is TUESDAY, Jan. 31st.

Download Quadratic Equations & Complex Numbers Test Review

Acc. Math I: HW for Thursday, Jan. 26th

Today we reviewed the three forms of a quadratic function: vertex form, intercept form, and standard form. Vertex form is  y = a(x - h)^2 - k where the vertex is (h, k) and the axis of symmetry is x = h.  Intercept form (or factored form) is y = a(x - p)(x -  q)  where p and q are the x-intercepts.  To find the axis of symmetry, find the average of the two x-intercepts. This is also the x-coordinate of the vertex. To find the y-coordinate of the vertex, substitute the x-coordinate back in to the equation and solve for y. Standard form is ax^2 + bx + c = 0. To find the vertex compute -b/(2a), then substitute that value in for x in the equation and solve for y to find the y-coordinate. The axis of symmetry will be x = -b/(2a).  We also converted from intercept form to standard form by multiplying and also from vertex form to standard form.

HW is from your Math II book:  p. 65 (13-24) Ignore the directions in the book, and just state the vertex and axis of symmetry   and    p. 66 (25-30) Convert to standard form.

Acc. Math I: HW for Wednesday, Jan. 25th

Today in class you learned that the discriminant (b^2 - 4ac) tells you about the roots of a quadratic equation. If the discriminant equals zero, there in only one root and that root is a real number. If the discriminant has a negative value, then the equation will have two imaginary roots. If the discriminant has a positive value, then the equation will have two real solutions.

Homework:  p. 94 in your Math II book   Do 1-6 and choose some problems from the next section to practice solving using the Quadratic Formula (your new BFF!!)

Homework for Tuesday, Jan. 24th

Today you learned the Quadratic Formula and how to use it to solve quadratic equations. Remember, your equation should be in standard form before you begin the QF.

Your assignment for tonight is in your Math II book, p. 93 (7-11 and 15-20). Be sure to express your answers in simplified radical form where appropriate.

Week of January 23rd-27th

Monday:  QUIZ over complex numbers and solving quadratic equations by factoring, taking the square roots, and completing the square

Tuesday: Go over quiz; learn solving by using the Quadratic Formula

Wednesday: more QF and discriminant

Thursday: Converting among forms of quadratics: vertex form, standard form, and intercept form

Friday: Review of unit    The TEST for this unit will likely be on TUESDAY, January 31st

Homework due Friday, Jan. 20th

I will be collecting the following homework/classwork on Friday, Jan 20th at the beginning of class:

Solve quadratic equations by taking the square root worksheet (1-36)

Solve quadratic equations by completing the square Math II book p. 88 (1, 2, 3, 6, 10-14, 16-18, 21-23)

Complex numbers day 1 worksheet (1-33)

Multiply and divide complex numbers Math II book p. 13 (5-15 odd and 21-37 odd) except for first period which did 6-16 even and 22-26 even instead

Answers to worksheet from Tuesday

Here are the worksheet answers for Tuesday's work. Be sure to bring any questions you have to class tomorrow.

Download Complex numbers day 1

This week in Acc. Math I: January 17th-20th

Monday: No school! MLK Day

Tuesday:  Begin study of complex numbers with writing complex numbers, simplifying complex expressions, adding and subtracting complex numbers.  HW is a worksheet.

Wednesday:  Multiply and divide complex numbers  HW is from your Math II book.

Thursday:  Solving with complex solutions  HW is a worksheet.

Friday: Graphing in the complex plane and finding absolute value of complex numbers. Also, review for quiz on Monday. HW will be a worksheet.

QUIZ over COMPLEX NUMBERS and SOLVING QUADRATIC EQUATIONS on MONDAY Jan. 23rd!!!!!