Step-by-step explanation:
Hope it helps you in your learning process.
Answer:

multiply either sides by 3:

divide either sides by πr² :

Yeah I don’t know yeah I don’t know why you don’t like it but I’m not a
Answer:
A is the Answer.
Step-by-step explanation:
You multiply x with 2x ( Gives you 2x^2 ) then -1 with 2x ( Gives you -2x ) then -8 with x ( Gives you -8x ) then -1 with-8 ( Gives you +8 ), finally you add the two x's ( not x^2 ). Your fibal answer will be 2x^2 - 10x +8.
Hope this helps.