-(x^ two /(four - x^ two) + one)/sqrt(four - x^ two) = zero
minus (x squared divide by (4 minus x squared ) plus 1) divide by square root of (4 minus x squared ) equally 0
minus (x to the power of two divide by (four minus x to the power of two) plus one) divide by square root of (four minus x to the power of two) equally zero
-(x^2/(4 - x^2) + 1)/√(4 - x^2) = 0
-(x2/(4 - x2) + 1)/sqrt(4 - x2) = 0
-x2/4 - x2 + 1/sqrt4 - x2 = 0
-(x²/(4 - x²) + 1)/sqrt(4 - x²) = 0
-(x to the power of 2/(4 - x to the power of 2) + 1)/sqrt(4 - x to the power of 2) = 0
-x^2/4 - x^2 + 1/sqrt4 - x^2 = 0
-(x^2 divide by (4 - x^2) + 1) divide by sqrt(4 - x^2) = 0