This task is about working out the value of an algebraic expression by substitution.
Show how to find out what each expression equals by substituting the given value into it.
| a) |
If p = 7, show how to find the value of 4(p + 3)
|
|
|
b) |
If m = ⁻3, show how to find the value of 4 + 2m
|
|
|
c) |
If r = 3, show how to find the value of 4r2
|
|
|
d) |
If s = ⁻3, show how to find the value of (s + 6)(s + 3)
|