Question

因式分解：x的三次方-4x的平方-12x 3a的立方-6a平方b+3a乘以b平方 x的平方乘以a -2ax+a

Answer 1

解

x³-4x²-12x

=x(x²-4x-12)

=x(x-6)(x+2)

第二题

3a³-6a²b+3ab²

=3a(a²-2ab+b²)

=3a(a-b)²

x²a-2ax+a

=a(x²-2x+1)

=a(x-1)²