# Math help please

posted by
**Melissa**
.

i tried these quesions so manytimes , but i just cant get he rigt answer !

1.) 4(2-a)^2-81

2.) -(x-y)^3

3.)3x^2-27(2-x)^2

4.) 9(y-1)^2-25

posted by
**Melissa**
.

i tried these quesions so manytimes , but i just cant get he rigt answer !

1.) 4(2-a)^2-81

2.) -(x-y)^3

3.)3x^2-27(2-x)^2

4.) 9(y-1)^2-25