Understanding Equation Conversion: Step-by-Step Guide for Combining Equations

[iqbal7]

I am reading this in a book and am having trouble understanding this.

Can someone explain the step by step the process in changing equation A into equation B?


Mrc= 2/3Pcb x b x 1/2d1 x 3/4d1

= 1/4Pcb x b x (d1)²



Many Thanks

 

[DonAntonio]

I am reading this in a book and am having trouble understanding this.

Can someone explain the step by step the process in changing equation A into equation B?


Mrc= 2/3Pcb x b x 1/2d1 x 3/4d1

= 1/4Pcb x b x (d1)²



Many Thanks

It is almost impossible to understand what you wrote (for me it is completely impossible). Please do learn how to use LaTeX within this site to write mathematics.

DonAntonio

 

[Stephen Tashi]

A thread about useing LaTex on physicsforums: https://www.physicsforums.com/showthread.php?t=546968

 

[algebrat]

It made perfect sense,

Remember that multiplication, does not require any distribution, that is, some students write

A(BC)=(AB)(AC). This is wrong. They are thinking of A(B+C)=AB+AC.

So multiplication only needs to happen once.

you have a copy of 2/3, 1/2 and 3/4. Take the first two 2/3 and 1/2, their product is 1/3.

Then 1/3 times 3/4 is 1/4. They also have two copies of d1, so that is (d1)^2.

I'm assumig by d1, you meant d_1

 

[iqbal7]

Thanks Algebrat,

You have explained it very clearly, and now I understand.