a) (x+2) \(\left(x^2-2x+4\right)\)
b) (3 - 2y) \(\left(9+6y+4y^2\right)\)
d) (4x - y) \(\left(16x^2+4xy+y^2\right)\)
a: \(=\left(x+2\right)\left(x^2-2x+4\right)\)
b: \(=\left(3-2y\right)\left(9+6y+4y^2\right)\)
c: \(=\left(y^2+1\right)\left(y^4-y^2+1\right)\)
d: \(=\left(4x-\dfrac{1}{2}y\right)\left(16x^2+2xy+\dfrac{1}{4}y^2\right)\)
e: \(=\left(5x^2-3y^3\right)\left(25x^4+15x^2y^3+9y^6\right)\)