Question

Решите :
√(26 + √(51)) × √(26 − √(51))

Answer 1

√(26 + √(51)) × √(26 − √(51))=√((26)²-(√51)²)=√ (676-51)=√625=25

Answer 2

$sqrt{26+sqrt{51}}*sqrt{26-sqrt{51}}=\\=sqrt{(26+sqrt{51})*({26-sqrt{51})}}=\\=sqrt{26^2-(sqrt{51})^2}=sqrt{676-51}=\\=sqrt{625}=25$