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[tex] { ( \sqrt{3 } - \sqrt{7} )}^{2} + \sqrt{84} [/tex]
helppp va rogg ​


Răspuns :

(√3-√7)²+√84=

=(√3)²-2√3×√7+(√7)²+2√21=

=3-2√21+7+2√21=10

(√3-√7)²+√84

=(√3)²-2√21+(√7)²+2√21

=3-2√21+7+2√21

=10