Answer:
10x + 9
Step-by-step explanation:
-1 - (-10x - 10)
Distribute.
-1 + 10x + 10
First, expand the terms inside the bracket you will get
it the third one
largest 4 digit number × largest 3 digit number
=9999 × 999
(10000-1)×(1000-1) = (a-b)(c-b)= ac-ab-bc+b^2
10000000-10000-1000+1 = 9989001