Help for algebra

Help for multiplying:

You know how to multiply two binomials:
(x + 3)(x + 4) = x² + 7x + 12

Today in class, I tried to show that the two numbers in the parenthesis (with the x's) will add together to make the middle term (3 + 4 = 7) and they multiply togther to make the last term (3 * 4 = 12). Using this, we could work backwards.

x² + 9x + 18 = ( _______ )( _______ ).

You know there has to be x's in the beginning of the parenthesis:

x² + 9x + 18 = (x ____ )(x ____ ).

The two numbers that go with the x's will add up to make 9, and multiply to make 18 (the two last terms from the problem). Think, what numbers multiply to make 18, but add up to 9. First, find all the combination's that multiply to make 18.

1x18
2x9
3x6

Which combination when you add makes 9? The last one. 3x6 = 18, and 3+6 = 9, so the two missing numbers are 3 and 6.

x² + 9x + 18 = (x + 3)(x + 6)

Monday 1/30/11

Homework for period 1,6,7: Finish the percent problems.

Period 3,4,5: Finish the 4 or 5 problems for factoring

x²+5x-24
x²+6x + 9
x²+11x+ 10
x²+13x-30

Thursday 1/27/11

Homework for period 1: No homework. Do learning upgrade

Period 4,5,6,7: NO homework, we redid the problems we missed in the benchmark

Tuesday/Wednesday 1/25/11

Homework for periods 1-7 On Tuesday and Wednesday

No homework, we did the benchmark

Monday 1/24/11

Homework for period 1,6,7: Finish page 95 finding percents with IS/OF=%/100

Periods 3,4,5: Finish page 8u2 multiplying binomials

Friday 1/21/11

Homework for periods 3,4,5: Page 383 #5-19

Period 6,7: Finish elephant percent page

Thursday 1/20/11

Homework for periods 6,7,1: Finish finding the percents.

Homework for periods 4,5: Finish the backside of the little page (combining like terms)

Wednesday 1/19/11

Homework for periods 1,6,7: Finish the discount sheet

Periods 3,4,5: Finish the algebraic fractions. (Mini half page)

Tuesday 1/18/11

Homework for period 3: Finish adding like terms mini worksheet page 63

Tuesday 1/18/10

Homework for periods 6,7,1: Finish 2 levels of learning upgrade. If you would like extra credit, do levels at home and

Wednesday 1/12/11

Homework for period 6,7,1: No homework. We were on a field trip


Period 3: Finish worksheet on finding slope between two points.

Tuesday 1/11/10

Homework for period 1: No homework

Period 3,4,5: Finish graphing the 5 functions you made up in class from the slope and a point, then graph the six other equations on the backside. Please staple your classwork to your homework so it is together when you turn it in.

Monday 1/10/11

Homework for periods 1,6,7: Change the fractions in to decimals using long division. Be sure you show your answers.

Period 3,4,5: Graph the 3 word problems on the back of your set of graphs.
1) Slope of 2 through the point (5,7)

2) Slope of -4 through the point (1,-2)

3) Slope of 3 through (2,4)

Friday 1/7/10

Homework for periods 3,4,5: Finish factoring worksheet (backside of Tuesdays homework)

Periods 6,7: Finish 1 level of learning upgrade

Thursday 1/6/11

Homework for periods 4,5: Page 65 worksheet, the top section, and problems I, T, and W from the bottom section.

Homework for periods 6,7: Finish the page of T-charts

Period 1: Finish 2 levels of learning upgrade.

Wednesday 1/5/11

Homework for periods 6,7: Finish page E-16, changing fractions to percents and back

Period 1: Finish the T charts

Period 3: Page 65 worksheet, the top section, and problems I, T, and W from the bottom section.

Tuesday 1/4/11

Homework for period 1: Finish E-16, changing fractions to percents and back

Period 3,4,5: Finish page 65 and 66 (two on one page PUNCHLINE) changing positive and negative exponents to normal numbers

Monday 1/3/11

Homework for periods 1,6,7: Finish fraction-decimal chart.

Periods 3,4,5: Finish 5-16 on page 76, and ALL of page 78