Question

rezultatul calcului
$\sqrt{75 } ( \sqrt{20} - \sqrt{125} ) \times { ( - \frac{1}{2})}^{ - 1}$
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Answer 1

√75(√20-√125)×(-1/2)⁻¹=

=5√3(2√5-5√5)×(-2)=

=5√3×(-3√5)×(-2)=

=(-15√15)×(-2)=30√15