Mario writes the equation (+)2=2+4(12) to begin a proof of the pythagorean theorem.
use the drop-down menus to explain why this is a true equation.

1st drop down menu answer is (x+y).

Second drop down menu is z^2 and then 1/2xy

Step-by-step explanation:

Step-by-step explanation:

First, we are going to solve the equation to find the value of . Let's solve the equation step by step Step 1. Use the distributive property to destroy the parenthesis: Step 2. Subtract 196 to both sides of the equation: Step 3. Factor the expression: Step 4. Set each factor equal to zero and solve for : or or Since we are dealing with lengths here, and lengths cannot be negative, the only valid solution is Now, we know from our problem that the missing side of the rectangle is given by the expression , so to find the actual length, we just need to replace with 8 in the given expression and simplify: units We can conclude that the missing side length represented by x + 8 units of the rectangle is 28 units. Read more on -