Question

Anyone in 10th grade please help me because I have to pass this later at 10 pm:(

Directions:Use the product rule to simplify the following monomials.

18.) 19m⁸n⁸ - (4m⁵n)(3m³n⁷)
19.) (-5cd)(-3c⁴d) - (7c²d²)(2c³)​

Answer 1

18)
`19m^8n^8-\left(4m^5n\right)\left(3m^3n^7\right)`

`=19m^8n^8-4m^5n\cdot \:3m^3n^7`

`=19m^8n^8-12m^8n^8`

`=7m^8n^8`

19)
`\left(-5cd\right)\left(-3c^4d\right)-\left(7c^2d^2\right)\left(2c^3\right)`

`=5cd\cdot \:3c^4d-7c^2d^2\cdot \:2c^3`

`=15c^5d^2-14c^5d^2`

`=c^5d^2`