Question

va rog cum se rezolva? (√5+√3)(√5-√3)

Answer 1

Folosim formula (a+b)(a-b)=a^2-b^2

$( \sqrt{5} + \sqrt{3} )( \sqrt{5} - \sqrt{3} ) = ( \sqrt{5} ) {}^{2} - ( \sqrt{3} ) {}^{2} = 5 - 3 = 2$