Simplifying expressions

[rachelmaddie]

Is this simplified correctly?


9k^6 * (4k^2 - 5) + 8k^4 * (4k - 5) - 6k^2 * (4x^2 - 5)
36k^8 - 45k^6 + 8k^4 * (4k^2 - 5) - 6k^2 * (4x^2 - 5)
36k^8 - 45k^6 + 32k^6 - 40k^4 - 6k^2 * (4x^2 - 5)
36k^8 - 45k^6 + 32k^6 - 40k^4 - 24^2 + 30k^2
36k^8 - 13k^2 - 40k^4 - 24k^4 + 30k^2
Solution: 36k^8 - 13k^6 - 64k^6 - + 30k^2

 

[yoscar04]

small typo in the first line, should be 8k⁴(4k²-5).