What is the value of 7.8 - x to the power of 2 when = 3?

Question

What is the Value of 7.8 - x to the power of 2 when x = 3?Please show work

Answer 1

Hi Chris;

x=3

 

(7.8-x)²

or

7.8-x²

 

I will begin with the first...

(7.8-3)²

(4.8)²

(4.8)(4.8)

23.04

 

Second...

7.8-3²

7.8-9

-1.2

Answer 2

(7.8-3)^2=

4.8^2=23.04