Question 143694
x^2+(2x-1)^2=(2x+1)^2

x^2+4x^2-4x+1=4x^2+4x+1
x^2-8x=0
x(x-8)=0

then x=8 or x=0
then x=8 and 2x+1=17

Answer the length of the hypotenuse is 17