Stupid Math Question

[czech09]

Ya so I can do Calc but I can't do algebra I guess...

how does 25(x^8)/36+1/2+9/100(x^8)=(5(x^4)/6+3/10(x^4))^2 ? I know how to get from the 2nd one to the first one but how do you do it the other way around...

Thanks

 

[neutralizer]

Do it backwards 😉.

 

[Mo0o]

u can't just use foil on the other side to figure it out?

 

[czech09]

No. I have to get it from the first part...

 

[cubby1223]

1) Set y=x^4
2) Rewrite as (1/(y^2))(25(y^4)/36+(1/2)y^2+9/100)
3) A miracle occurs
4) =(5(x^4)/6+3/10(x^4))^2
5) ...
6) Profit?

 

[Mo0o]

use the identity (a+b)^2 = a^2 + 2ab + b^2

Which math is this? Algebra 1/2 ?

 

[czech09]

Originally posted by: Mo0o
use the identity (a+b)^2 = a^2 + 2ab + b^2

Which math is this? Algebra 1/2 ?

Lol this is a part of Calc 2 just some Linear Arc Length bs. As I said I can do calc but I can't do algebra thanks for the help! 🙂