Problem : Factor 2x4 -2y4.

2(x2 + y2)(x + y)(x - y)

Problem : Factor 4x4 -9y4.

(2x2 +3y2)(2x2 -3y2)

Problem : Factor 9x6 -16y6.

(3x3 +4y3)(3x3 -4y3)

Problem : Factor x6 - y6.

(x + y)(x - y)(x2 - xy + y2)(x2 + xy + y2)

Problem : Factor x4 +2x2 - 24.

(x + 2)(x - 2)(x2 + 6)

Problem : Factor 28x4 -18x2 + 2.

2(7x2 -1)(2x2 - 1)

Problem : Factor 4x5 +16x3 + 15x.

x(2x2 +5)(2x2 + 3)