Question

(5 root 3 - 3 root 5 ) (5 root 3 + 3 root 5)
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Answer 1

Answer:

30

Step-by-step explanation:

$(5 \sqrt{3} - 3 \sqrt{5} )(5 \sqrt{3} + \: 3 \sqrt{5} ) \\ \\ we \: know \: that\: \\ (x - y)(x + y) = {x}^{2} - {y}^{2} \\ \\ = {(5 \sqrt{3} )}^{2} - {(3 \sqrt{5}) }^{2} \\ = 75 - 45 \\ = 30$