Question

一道数学的因式分解2X^3-X²+X+1.

Answer 1

原式=2x^3-x^2+x+1

=2x^3+x^2-2x^2-x+2x+1

=x^2(2x+1)-x(2x+1)+(2x+1)

=(x^2-x+1)(2x+1)