What is the difference between a two column, flowchart, and a paragraph proof? need for the

A two column proof shows an algebraic step being taken, and then describes the step and how it's justified to the right.

A flowchart proof links each step to the next, with a brief description below it.

A paragraph proof describes each step in a group of text, written as a paragraph.

-14

step-by-step explanation:

2x2 – 2(x+4)

=2x2-2（5+4）

=4-2×9

=4-18

=-14