oblicz podwojona sumę liczb:
a) √20,√125, √45
proszę jak najszybciej:)
2*(√20+√20) = 4√202*(√125+√125) = 2*2√125 = 4√1252*(√45+√45) = 2*2√45 = 4√45
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2*(√20+√20) = 4√20
2*(√125+√125) = 2*2√125 = 4√125
2*(√45+√45) = 2*2√45 = 4√45