# How do you evaluate #x^3 + 5# when x = 4?

##### 1 Answer

Mar 31, 2018

#### Explanation:

#"substitute x = 4 into the expression"#

#rArr(color(red)(4))^3+5#

#=(color(red)(4)xxcolor(red)(4)xxcolor(red)(4))+5#

#=(16xxcolor(red)(4))+5=64+5=69#