To find the value of the expression 36x + 8y² when x = 3 and y = 6, we will substitute the values of x and y into the expression.
First, substitute x = 3:
- 36x becomes 36 * 3 = 108.
Next, substitute y = 6 into 8y²:
- 8y² becomes 8 * (6)² = 8 * 36 = 288.
Now, add the two results together:
- 108 + 288 = 396.
Thus, the value of 36x + 8y² when x = 3 and y = 6 is 396.