I need help again also would like to see if someone can double check for me

These are the ones I could use help with:

Reduce to lowest term:

x^2-y^2

------------- (fraction)

x^2+2xy+y^2

X^2-6x+9 3

---------- X ----- (fraction)

3x x-3

Find the LCD by factoring

4 3

------ , --------

x^2-16 x^2+8x+16

If the length of a rectangle is 5/2x feet and the width is 2/3x feet, express the perimeter of the rectangle in the simplest form? :

Check:

Factor out the GCF:

6x^4y^2-18x^2y^2+9x^2y^4

Answer ----- 3x^2y^2(2x^2-6+3y^2)

Factor:

16x^2-49y^2

Answer ----- (4x-7y)(4x+7y)

Factor:

x^2+6x-16

Answer ---- (x-3)(2x+5)

Factor:

X^3-8

Answer ----- (x-2)(x^2+2x+4)

Perform operation (addition):

7 2

-------- + --------

2x-6 x-3

Answer ------ 11x-33

---------

2x^2-12x+18

Help please