Надо 2√7-3√2 / 3√7-2√2 /- дробная черта

(2√7-3√2)/(3√7-2√2)=[(2√7-3√2)*(3√7+2√2)] /[(3√7-2√2)*(3√7+2√2)]=[2√7*3√7-3√7*3√2+2√7*2√2-3√2*2√2]/[(3√7)²-(2√2)²]=[42-9√14+4√14-12]/[9*7-4*2]=[30-5√14]/55=5(6-√14)/55=(6-√14)/11.