Question

What is the value of X ?

Answer 1

`x^2+12^2=13^2\\\\ x^2+144=169 \ |-144 \\\\ x^2=25 \\\\ x=√(25) \\\\ x=5`
or

`x^2+12^2=13^2\\\\ x=√(13^2-12^2)=√(25)=5`

Answer 2

X = 5. Using the pythagreom theorem, a²+b²=c², to solve x we put in the numbers into the equation getting a²+12²=13². Then solve for a. a²=25, 5·5=25, a=5 which means x=5.