# Week 11 pre-calculus

this week I learned about quadratic inequalities, this is brand new for me. It has greater- than and less-than in inequality. And how to graphing quadratic inequalities, ugly line and perfect line. And add (0,0) to find out which side is it.

# Eal skill

Someone who in the picture is very colorful, because she just played before she took this picture.

She seems angry and disappointed,although she is colorful .

maybe she likes purple and orange, because those colors are all on her body and hair.

She couldn’t clean it out,unless she took a shower but there’s no water here.

she was looking at someone that she hated, because she was tricked.

She was eager to kill people,since she was tricked and becomes colorful, but she didn’t.

# week 10 pre-calculator

I didn’t learn anything this week，but I reviewed what I learned before. Such as Sequences and series, Absolute Value and Radicals and Quadratic equations, etc.

# week 9 pre-calculator

this week I learned about how to solving problems with Quadratic functions, some problems can be solved by writing,  Then graphing a quadratic function. And determining maximum or minimum related to operations with numbers. And modeling a problem for maximizing profits.

# week 8 pre-calculator

This week I learned about how to find out vertex, and how the graph looks like.

# Week 7 pre-calculus

This week I have learned about the properties of quadratic function. And we learn it from its graph.

Vertex

x-intercept

y-intercept

domain

range

line of  symmetry

# Week 6 pre-calculus

this week I learned about the quadratic formula. √b2 − 4ac/2a.

ax2 + bx + c = 0
…where a, b, and c are the numerical coefficients of the terms of the quadratic, the value of the variable x is given by the following equation:

# Week 5 pre-calculator

this week I did a test and learned about how to solving quadratic equations by factoring.

Zero-Product Property: If we multiply two (or more) things together and the result is equal to zero, then we know that at least one of those things that we multiplied must also have been equal to zero. Put another way, the only way for us to get zero when we multiply two (or more) factors together is for one of the factors to have been zero.

So, if we multiply two (or more) factors and get a zero result, then we know that at least one of the factors was itself equal to zero. In particular, we can set each of the factors equal to zero, and solve the resulting equation for one solution of the original equation.

# Week 4 pre-calculator

this week I learned about roots. The root is a mathematical symbol √￣. For example a^a=b, √b=a.

# week 2 in precalculus 11

This week I am first time go to school, and first time study math by English. Unfortunately math is my first class, I still tried and hungry during the class. And I learned about sequence this week, it’s difficult for me.