Comments for ClassBrain Math

Comment on How Do You Translate A Graphed Object? by Loren Sotomayer

Loren Sotomayer — Sun, 27 Nov 2011 13:31:28 +0000

Great posts guys. Keep up the good work!

Comment on How Do You Simplify Complex Fractions? by admin

admin — Thu, 27 Oct 2011 21:10:42 +0000

He is reducing the fraction at that point.

Since you have 3/5 x 7/9 , it is the same as 3/9 x 7/5.
Reduce the 3/9. It becomes 1/3.

Then you have 1/3 x 7/5. Multiply across and you get 7/15.

Comment on How Do You Simplify Complex Fractions? by Philip

Philip — Mon, 10 Oct 2011 22:49:39 +0000

Hey I was just wondering how does the 9 turn into 3 and the 3 turns into 1 do you divide both by the numerator of the first fraction (3) ?

Comment on How Do You Complete the Square? by admin

admin — Sun, 09 Oct 2011 11:49:35 +0000

Simplifying
4x^2 + 3x + -6 = y

Isolate the 1st 2 terms:
4x^2 + 3x + 0 = 6

Divide through by 4 to bring 1st term to x^2
x^2 + 3/4x + 0 = 6/4

Take half of the coefficient (don’t forget the sign!) of the x-term, and square it. Add this square to both sides of the equation.
x^2 + 3/4x + (3/8)^2 = 6/4 + (3/8)^2

Simplify
x^2 + 3/4x + 9/64 = 6/4 + 9/64

Place into standard form
(x + 3/8)^2 = 96/64 + 9/64

Combine Like terms
(x + 3/8)^2 = 105/64

Square-root both sides, remembering the “±” on the right-hand side. Simplify as necessary.
x + 3/8 = ±√105/8

Solve for x
Remember that the “±” means that you have two values for x.
x = -3/8 + √105/8
x = -3/8 – √105/8

Comment on What are the Properties of Logarithms? by Title

Title — Sat, 08 Oct 2011 18:43:40 +0000

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Comment on How Do You Complete the Square? by Figure Complete | RRVOD Action Figures

Figure Complete | RRVOD Action Figures — Wed, 05 Oct 2011 15:20:37 +0000

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Comment on What are the Properties of Logarithms? by Algebra 1 Help

Algebra 1 Help — Sun, 18 Sep 2011 19:20:36 +0000

This is a pretty good video that covers a lot of material about logarithms. It’s pretty cool to get all of this in one place. When I’m finding materials for people who ask me about it, I usually have to piece something together from a lot of different sources. Thanks!

Comment on Properties of Real Numbers by Triginomerty help | Blissbowls

Triginomerty help | Blissbowls — Tue, 06 Sep 2011 06:55:02 +0000

[...] Properties of Real Numbers | ClassBrain MathJun 7, 2011 … I love the links too to other math resources. Thanks for sharing them. Triginomerty properties | Marybuyshouses says: … [...]

Comment on How Do You Complete the Square? by admin

admin — Thu, 16 Jun 2011 05:33:52 +0000

Thanks for the alternate method.

Comment on Properties of Real Numbers by Triginomerty properties | Marybuyshouses

Triginomerty properties | Marybuyshouses — Tue, 07 Jun 2011 06:28:46 +0000

[...] Properties of Real Numbers | ClassBrain MathThese five properties of real numbers, include the Associative, Commutative, Multiplicative and Additive Identity, Multiplicative and Additive Inverse, and Distributive Properties. … This video covers the five basic properties of real numbers. [...]