Level:
Project ID:
9000101601
Source Problem:
Accepted:
1
Clonable:
1
Easy:
0
Expand \((1 + x)\left (x^{2} + x - 1\right )(1 - x)\).
\(- x^{4} - x^{3} + 2x^{2} + x - 1\)
\(x^{4} - x^{3} + 2x^{2} + x + 1\)
\(- x^{4} + x^{3} - 1\)
\(x^{4} + x^{3} - 2x^{2} + x - 1\)