Разложить на множители: (х-1)/(√х-1)-(х-25)/(√х+5)
(х-1) / (√х-1) - (х-25) / (√х+5) = ((√х)²-1²) / (√х-1) - ((√х)²-5²) / (√х+5) = = (√х-1)(√х+1) / (√х-1) - (√х-5)(√х+5) / (√х+5) = (√х+1) / (√х-5) = (√х+1)(√х-5)⁻¹