Question

Someone pls help I'm not sure how to do this can someone explain pls ​

Answer 1

Explanation:

Volume = 2 ( x + 3) ( x-1 )(x + 3 ) + (2x) (x + 3) ( x + 3 - 2x )

= 2 ( x + 3) ( x-1 )(x + 3 ) + (2x) (x + 3) ( 3 - x )

= 2 (x - 1 ) (x² - 9) + 2x * (9 - x²)

= 2 (x - 1 ) (x² - 9) - 2x * ( x² - 9)

= (x² - 9) ( 2x - 2 - 2x )

= (x² - 9) (-2)

= -2x² + 18

Answer 2

Answer:if v= cm3 then

Explanation:

Make V the subject of the formula.

Then use the x-1 and get the measurements from right angle.

A right angle is 90cm, so you can get the rest.