Elementary Algebra questions

[Stephen2000]

Can someone please explain to me how do you get the result of 9_X² ₊ 4_Y² - 12_XY From problem (3_x - 2_y)² ?

Please explain in details how to solve this problem: if x > 2, then x² -x-6 = Thank you!
x²-4

 

[daon2]

Can someone please explain to me how do you get the result of 9_X² ₊ 4_Y² - 12_XY From problem (3_x - 2_y)² ?

Please explain in details how to solve this problem: if x > 2, then x² -x-6 = Thank you!
x²-4

Please read the rules: http://www.freemathhelp.com/forum/threads/78006-Read-Before-Posting?p=322217&viewfull=1#post322217

What is confusing for you?

\(\displaystyle (3x-2y)^2=(3x-2y)(3x-2y)=3x(3x-2y) - 2y(3x-2y)\)

See what to do now?

For the second question, do you know how to factor?

 

[mmm4444bot]

9_X² ₊ 4_Y² - 12_XY

(3_x - 2_y)² ?

Weird notation. What's up with the subscripts?

Also, don't interchange X and x. Pick upper-case or lower-case, not both.