Question

please give me answers in step-by-step its urgent ​

Answer 1

Answer:

Step-by-step explanation:

take the pic clearly and send

Answer 2

Answer:

Pls mark me as a brilliant.

Step-by-step explanation:

3x^3+15x+7-(7x^3-11x^2+5x-9)

3x^3+15x+7-7x^3+11x^2-5x-9

3x^3-7x^3+15x-5x+7+9-7x^3

-4x^3+10x+16-7x^3

Ans=> -4x^3+10x+16-7x^3.