Factorization

Factorize: 4x^4 + 1

Factorize: x^2 - y^2 - z^2 + 2yz

Factorize: (a+b)^3 - (a-b)^3

Factorize: x^4 + 64

Factorize: 1 - a^2 - b^2 - 2ab

Factorize: x^2 + 2x - y^2 + 1

Factorize: a^2 - 4b^2 - 4b - 1

Factorize: x^4 + 3x^2 + 4

Factorize: x^3 - 3x^2 + 3x - 1

Factorize: x^3 - 2x^2 - x + 2

Factorize: a^6 + b^6

Factorize: x^4 + 2x^2 + 9

Factorize: (x+y)^2 - 5(x+y) + 6

Factorize: x^2 - 4xy + 4y^2 - z^2 - 6z - 9

Factorize: a^2 - b^2 - c^2 + d^2 - 2(ad - bc)

Factorize: x^5 + x + 1

Factorize: 64x^6 - 1

Factorize: x^4 + x^2 + 25

If x+1 is a factor of x^3 + kx^2 + 3x + 1, find k.

What are the factors of x^2 - 16?