Question

calculează
va rog, vreau si rezolvarea
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Answer 1

$5\sqrt{3} - (4 \sqrt{5 } - 5 \sqrt{5} )\times \frac{1}{2} = 5 \sqrt{3} - ( - \sqrt{5} ) \times \frac{1}{2} = 5 \sqrt{3} + \frac{ \sqrt{5} }{2}$