3x^2 + 18 - 8x
What is the value of the expression when x = 4
To find the value of the expression when x =4, we substitute x=4 into the expression:
3(4)^2 + 18 - 8(4)
= 3(16) + 18 - 8(4)
= 48 + 18 - 32
= 66 - 32
= 34
Therefore, when x = 4, the value of the expression is 34.