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Posted by **ted** on Monday, January 3, 2011 at 10:14pm.

when i worked out this question, I got the answer as X=-5.1 or X=3.1

is my answer right, if it is not right .can you pls tell me and then explain to me where i went wrong.

Thank you.

- math -
**bobpursley**, Monday, January 3, 2011 at 10:37pm6^2=x^2+(x+2)^2

solve for x

36=x^2+x^2+4x+4

2x^2+4x-32=0

x^2+2x-16=0

x= (-2+-sqrt(4+64))/2=-1+-sqrt17

x=-1+-4.17

then, since it makes no sense for x to be negative, the x=3.17, and the last side then is 5.17

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