Question

求多项式a的三次方减6a的二次方b加9ab的二次方怎样分解因式？

Answer 1

a³-6a²b+9ab²
=a(a²-6ab+9b²)
=a(a-3b)²

Answer 2

a^3-6a^2b+9ab^2
=a(a^2-6ab+9b^2)
=a(a-3b)(a-3b)