- two *x*(x + one)/(x^ two + one)^ two + one /(x^ two + one) = zero
minus 2 multiply by x multiply by (x plus 1) divide by (x squared plus 1) squared plus 1 divide by (x squared plus 1) equally 0
minus two multiply by x multiply by (x plus one) divide by (x to the power of two plus one) to the power of two plus one divide by (x to the power of two plus one) equally zero
-2*x*(x + 1)/(x2 + 1)2 + 1/(x2 + 1) = 0
-2*x*x + 1/x2 + 12 + 1/x2 + 1 = 0
-2*x*(x + 1)/(x² + 1)² + 1/(x² + 1) = 0
-2*x*(x + 1)/(x to the power of 2 + 1) to the power of 2 + 1/(x to the power of 2 + 1) = 0
-2x(x + 1)/(x^2 + 1)^2 + 1/(x^2 + 1) = 0
-2x(x + 1)/(x2 + 1)2 + 1/(x2 + 1) = 0
-2xx + 1/x2 + 12 + 1/x2 + 1 = 0
-2xx + 1/x^2 + 1^2 + 1/x^2 + 1 = 0
-2*x*(x + 1) divide by (x^2 + 1)^2 + 1 divide by (x^2 + 1) = 0