two *(- four *x^ two /(x^ two - one) + one)/(x^ two - one)^ two = zero
2 multiply by ( minus 4 multiply by x squared divide by (x squared minus 1) plus 1) divide by (x squared minus 1) squared equally 0
two multiply by ( minus four multiply by x to the power of two divide by (x to the power of two minus one) plus one) divide by (x to the power of two minus one) to the power of two equally zero
2*(-4*x2/(x2 - 1) + 1)/(x2 - 1)2 = 0
2*-4*x2/x2 - 1 + 1/x2 - 12 = 0
2*(-4*x²/(x² - 1) + 1)/(x² - 1)² = 0
2*(-4*x to the power of 2/(x to the power of 2 - 1) + 1)/(x to the power of 2 - 1) to the power of 2 = 0
2(-4x^2/(x^2 - 1) + 1)/(x^2 - 1)^2 = 0
2(-4x2/(x2 - 1) + 1)/(x2 - 1)2 = 0
2-4x2/x2 - 1 + 1/x2 - 12 = 0
2-4x^2/x^2 - 1 + 1/x^2 - 1^2 = 0
2*(-4*x^2 divide by (x^2 - 1) + 1) divide by (x^2 - 1)^2 = 0