Question

5(k-2)-18]-(k-1)[5(k-1)-(k-2)]+17[(k-1)-(k-2)​

Answer 1

Step-by-step explanation:

5(k-2)-18]-(k-1)[5(k-1)-(k-2)]+17[(k-1)-(k-2)

[5k-10-18]-(k-1)[5k-5-k+2]+17(k-1-k+2)

[5k-28]-(k-1)[4k-3]+17×1

[5k-28]-(4k²-3k-4k+3)+17

5k-28-(4k²-7k+3)+17

5k-28-4k²+7k-3+17

-4k²+12k-14