How do you evaluate (d+1)(d-1+6) d=2?

1 Answer
Oct 15, 2015

Answer:

The answer is 21

Explanation:

How to get the answer:

  1. Replace the variable with the value #=># #(2+1)(2-1+6)#
  2. First you would do #(2+1)=3#
  3. The problem is now #(3)(2-1+6)#
  4. Now you do #2-1# . You do this instead of doing #1+6# because you do subtraction and addition from left to right
  5. Then you have #(3)(1+6)# = #(3)(7)#
  6. Parentheses tell you to multiply so the answer you should get is twenty-one

I took a picture of the elongated steps because I describe how to solve inside the parentheses enter image source here