In week 17 we finished last chapter.This chapter about Trigonometry.It was easy chapter.and we have test about this chapter on Wednesday.

example:  a²=b²+c² we just apdate to r²=x²+y² .This is a firs lesson 

The second lesson about reference angles.The reference angle for any angle in standard position can be determined .for an angle in Quadrant 2 such as 155°,the reference angle is:

180º-155°=25°

The fours lesson about sine law

And some example:

And in the last lesson in this chapter we learned the coding law.

The coding Low :ΔASL    a²=s²+l²-2sl cosA

In week 14 we learned about Rational Expressions and equations it is a easy chapter.On Wednesday we had tast chapter 8.On Friday we studied lesson 7.2 and did home work in class.l’m glad to in Ms Burton’s class.

In week 13 we learned about Absolute Value and Reciprocal function.l’m soo try to learn this chapter and on Friday and Saturday I practiced soo mach because we have test on Wednesday and I’m soo worried.I hope to finish this exam successfully.

now some example about this chapter: Continue reading

In week 12 we learned about Absolute value and Reciprocal Function.And this week also we had test about Graphing Inequalities and systems of equations.At first I thinked it was difficult but it was  essy.example about new learn:

ex

In week 11 we learned about Graphing Inequalities and systems of Equations.It was interesting .This week is soo short because an mondey we had test it was not bad but it should better than.I hope in next test I get a better mark.And I trying hard for up my mark .

Example 1: (x-2)(x-6)≤0   (x-2)=0   x=2      (x-6)=0    x=6               2≤ x≤6

example 2: 3x-2y≥-16     A(-3,4)    -9-8≥-16    -17≥-16 it is not ture.

4x-y≤5            b(-1,1)          -4-1≤5     -5≤5      it is ture.

 

 

I learned in week 9 stendard form and factoring form.This two formals is very help ful for solving.I think I learned very well and I hope to get good mark in the test.

The standard form Y=(x-p)²+q

The factor form y=a(x-x‚)(x-x„)

exempel:(5,18) and root of -1 and 8

y=a(x+1)(x-8). 18=a(5+1)(5-8). 18= -18a

a=-1

This week we learned about Solving a Quadratic Equation Graphically.I think I did very good and I learn very well.I learned how fine of vetex,domain and range. And we learned    Y=a(x–p)²+q

when -x² is open down and it is maximum

when x² is open up and it is minimum

V=(2,–1).      A=(4,–3)

now I use  Y=a(x-p)²+q.     -3=a(4-2)²-1

-3+1=a4.  -2=a4    a=-½.   Y=-½(x-2)-1

In week 6 we learned about factoring and Solving quadratic.lf we to be careful there are very easy.l like math.and l like formula.

For example: (x+5)(x+8)=0.      X+5=0 ”’x=  -5

X+8=0.     X=  -8

For example: √4x +3=x.     (√4x)²=(x-3)²      4x=x²-6x+9.   X²-10x+9=0.  (X-1)(x-9)=0. X=1.     X=9

For example: x²+4x=2.( 4½)²=4

X²+4x+4=2+4.    X²+4x+4=6.    (x+2)²=6

√(x+2)²=√6.     X+2=+_√6.  X=-2+_√6

 

  1. In the week5 we learned radical and factoriel

For example: √6x=2.    (√6x)²=2²     6x=4

6x÷6=4÷6.    X=\frac{2}{3}

For example:

(3x_1)²-(2y+5)²            3x-1=a.          2y+5=b

(a)²-(b)²               (a-b)(a+b)         (3x-1-2y-5)(3x-1+2y+5)

(3x-2y-6)(3x+2y+4) Continue reading