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I need an answer and explanation

12^2 + x^2 = 13^2

Step-by-step explanation:

The student's error was that he didn't use the Pythagorean Theorem correctly

According to the Pythagorean Theorem, a^2 + b^2 = c^2, where c represents the hypotenuse

However, the student replaced c with x, which isn't the hypotenuse

The hypotenuse is 13, so c should be 13, not x

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what is the image?

answer:   b

step-by-step explanation:

x2 = 16

x can not be a negative number because 16 is positive

the only answer would be positive 8