Question

What is the value of the expression shown below if x = 3, y = 6, and z =
4?
x² + 3yz

Answer 1

`81`

Explanation:

The initial expression:

`x^2+3yz`

Identify your values:

`x=3\\y=6\\z=4`

Substitute:

`(3)^2+3(6)(4)`

Following PEMDAS, nearly everything is in parentheses, so move to exponents:

`9+3(6)(4)`

Multiply
`6` and
`4`:

`9+3(24)`

Multiply
`3` and
`24`:

`9+72`

Simplify:

`81`