Question

calcule Pares realizar múltiples cuando haya dos paretisis

Answer 1

2)
$(5 \sqrt{3} - \sqrt{5} )( \sqrt{3} + \sqrt{5} ) \\ = 5 \times 3 + 5 \sqrt{3 \times 5} - \sqrt{3 \times 5} - 5 \\ = 15 + 5 \sqrt{15} - \sqrt{15} - 5 \\ = 10 + 4 \sqrt{15}$

4)
${( - \sqrt{6} + 3)}^{2} \\ = ( - \sqrt{6} + 3)( - \sqrt{6} + 3) \\ = 6 - 3 \sqrt{6} - 3 \sqrt{6} + 9 \\ = 15 - 6 \sqrt{6}$
8)
$(2 \sqrt{10} - \sqrt{5} )(3 \sqrt{10} + 2 \sqrt{5} ) \\ = 6 \times 10 + 4 \sqrt{50} - 3 \sqrt{50} - 2 \times 5 \\ = 60 + \sqrt{25 \times 2} - 10 \\ = 50 + 5 \sqrt{2}$