Question

Решите номер 7. Заранее спасибо!

Answer 1

4/(2V3 + 1) - 4/(2V3 - 1) = (4(2V3 - 1) - 4(2V3 + 1))/(12 - 1) = (8V3 - 4 - 8V3 - 4)/11 = -8/11

Answer 2

42√3+1 -42√3-1=4*(12√3+1-12√3-1)=4*(2√3-1-(2√3+1)(2√3+1)*(2√3-1))=4*((-1-1(4*3+2√3-2√3-1))=4*(-212-1)=4*(-211)=(-811)