Question

This is so confusing someone please help me out

Answer 1

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step 1 is wrong . The 1st step should be 15² - 9² = c² .

Answer 2

Answer: step A

Explanation:

The Pythagorean theorem is a^2+b^2=c^2, where c is always the hypotenuse (the longest side of the triangle). Step A is written as 9^2(thats the a value squared)+15^2(which is the hypotenuse value squared)=c^2. It should be: 9^2+b^2=15^2