\(a,=4x^2+4xy+y^2\\ b,=9x^2-12xy+4y^2\\ c,=x^4-\dfrac{4}{9}y^2\\ d,=x^3-8y^3\\ e,=8x^3+12x^2y^2+6xy^4+y^6\\ f,=27x^6-54x^4y+36x^2y^2-8y^3\\ g,=\left(x^2-1\right)\left(x^2+1\right)=\left(x-1\right)\left(x+1\right)\left(x^2+1\right)\\ h,=\left(4x^2-y^2\right)\left(4x^4+2x^2y^2+y^4\right)=\left(2x-y\right)\left(2x+y\right)\left(4x^4+2x^2y^2+y^4\right)\)


