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Use the Pythagorean Theorem.
2sqrt(5)
In the formula, a and b are the legs and c is the hypotenuse of a right triangle. We are given a triangle with a=x, b=4, and c=6.
Substitute values
Calculate power
LHS-16=RHS-16
sqrt(LHS)=sqrt(RHS)
Split into factors
sqrt(a* b)=sqrt(a)*sqrt(b)
Calculate root