- 2
+ 10xΒ³ - 21xΒ² + 19x - 4
step-by-step explanation:
each term in the second factor is multiplied by each term in the first factor
xΒ²(- 2xΒ² + 4x - 1) - 3x(- 2xΒ² + 4x - 1) + 4(- 2xΒ² + 4x - 1) β distribute
= - 2
+ 4xΒ³ - xΒ² + 6xΒ³ - 12xΒ² + 3x -8xΒ² + 16x - 4
collect like terms
= - 2
+ 10xΒ³ - 21xΒ² + 19x - 4 β in standard form