Question

Answer 1

`a, (x^2+9)^2=x^4+18x^2+81`.

`b, (2x^2+1)^2=4x^4+4x^2+1`

Answer 2

`c, (x^2-y^2)^2=(x^4-2x^2y^2+y^4`.

`d, (3x-y^2)^2=9x^2-6xy^2+y^4`.

Answer 3

`e, (x+2y^2)^2=x^2+4xy^2+4y^4`.

`f, (2x+3y^2)^2=4x^2+6xy^2+9y^4.`

Answer 4

`g, (4x-2y^2)^2=16x^2-16xy^32+4y^4`.

`h, (4x^2-2y)^2=16x^4-16x^2y+4y^2`.