Lesson 4
Practice Makes Perfect
Prowess with powers
Page 127
Your answer :
2(42) + 3(41) + 2(40) = 45.
You went wrong somewhere. Let’s check your arithmetic:
2(42)
= 2(4 × 4) = 32
+ 3(41)
= 3(4) = + 12
+ 2(40)
= 2(1) = + 2
Now, what is the sum of these products?
Return to page 134 and pick out the right answer.
