Expand the expression 2(r-4)+5(r+2). Express your answer in simplest form?

1 Answer
Apr 19, 2018

7r + 2

Explanation:

A bracket indicates multiplying the separate items inside the brackets (those separated by a + or -) with the number in front of the brackets.

Therefore, in the first set of brackets, you must multiply r by 2 (2r), -4 by 2 (-8). In the second set of brackets, you must multiply r by 5 (5r) and 2 by 5 (10).

2r - 8 + 5r + 10

Then, you group like terms (the r's together) and the constant numbers (10 and -8) together;

=> 7r + 2