Answer:
x = 5
Step-by-step explanation:
13^2 - 12 ^2 = x^2
169 - 144 = x^2
25 = x^2
[tex]\sqrt{25} = \sqrt{x^2}[/tex]
12² + x² = 13²
144 + x² = 169
144 - 144 + x² = 169 - 144
x² = 25
√x² = √25
