Find, explain, and correct the error in the student work below.

3x - 2x + 10 = 5x + 10
1x + 10 = 5x + 10
-10 -10
1x = 5x

contradiction, no solution because 1 = 5

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form

7

step-by-step explanation: