Answer:
x = 2[tex]\sqrt{35}[/tex]
Step-by-step explanation:
Using Pythagoras' identity in the right triangle
x² + b² = a² , that is
x² + 2² = 12²
x² + 4 = 144 ( subtract 4 from both sides )
x² = 140 ( take the square root of both sides )
x = [tex]\sqrt{140}[/tex] = [tex]\sqrt{4(35)}[/tex] = 2[tex]\sqrt{35}[/tex]
