Someone pls i'm not sure how to do this can someone explain pls

Step-by-step 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: solve 5\cdot 2^x=2405⋅2  

x

=2405, dot, 2, start superscript, x, end superscript, equals, 240.

solution

to solve for xxx, we must first isolate the exponential part. to do this, divide both sides by 555 as shown below. we do not multiply the 555 and the 222 as this goes against the order of operations!

\begin{aligned} 5\cdot 2^x& =240 2^x& =48 \\ \end{aligned}  

5⋅2  

x

2  

x

​    

=240

=48

​

step-by-step explanation:

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct