1. Subtract the following polynomials: (4x - 9x - 7) - (3x - 5x - 6)
2. Multiply and combine like terms:(x - 10)(x + 9)
3. Multiply:(3x - 5y)²
4. Factor completely:10r³s² + 25r²s² - 15r²s³
5. Factor the trinomial:3x² + 7x + 2
6. Factor by grouping: 2ax + 5a - 8x - 20
7. Factor:
8. Solve the equation byfactoring:x²- 7x + 12 = 0
9. Write using positveexponents:
10. Write the number 0.000000174 in scientific notation

Please help me with these math problem if you can write them out and answer step by step so that i understand