Alexander B. answered • 09/13/15

PhD in Engineering with 20 yrs of Math and Science Teaching Experience

^{2 }+ 2x - e

^{2 }= 0

^{2}+ 2x - 7.389056 = 0

_{1}= 1.89638

x

_{2}= -3.89638

**1.89638.**

*Note*: this value corresponds to the exact solution √(1+e

^{2})-1.

Alexander B.

09/13/15

Mark M.

09/13/15

Alexander B.

^{2})-1 shown and also a rounded decimal value 1.89638, which corresponds to that exact solution w/some rounding error as it's clearly stated. This estimate is included just for added clarity: for any experienced math student it's relatively easy to see that the value of the expression is positive, thus it should be valid (unlike that second one -1-√(1 + e

^{2}) included in your original solution). Best regards,

09/14/15

Mark M.

09/13/15