Question

5-x=3 work out the value of 3x²

Answer 1

5-x = 3

X is 2 as 5 minus 2 is 3

Then sub x=2 Into 3x^2

3 times by 2^2 is 3 x 4 which is 12

Answer 2

The value of 3
`x^(2)` is 12.

Explanation:

The problem can be solved by using "algebraic expressions."

Get the value of x with the equation: 5-x=3

Step 1: 5-3 = x or x = 5-3

Step 2: x = 2

Now, that you know the value of x, substitute the value of x in 3
`x^(2)`.

Step 3: 3 x
`2^(2)`

Step 4: 3 x 4

Answer: 12

The value of 3
`x^(2)` is 12.