Question

Вычислите (√7-4√3)^2

Answer 1

(√7-4√3)^2=7-2*4*√21+16*3=55-8√21
------------------------------------------------

Answer 2

$( sqrt{7} -4 sqrt{3} ) ^{2} =( sqrt{7} ) ^{2} +(4 sqrt{3} ) ^{2} -2* sqrt{7} *4 sqrt{3} = \ =7+48-8 sqrt{21} =55-8 sqrt{21}$