Please help me I have 2 of them answered already and I need to know if they are correct. Also I need to know the last one so if you can help me pleaseee do. Thank youuu. I will give brainliest to whoever answers correctly!!

1) 30000

2) 5

3) 12500

Step-by-step explanation: I never did this kind but I try I don’t know how to explain it your way but here hope this help

a 10 percent increase

- 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