Question

c) -2√80 + 3√20 – 4√20 +√ 45​

Answer 1

In primul rand facem : *radical* 2^2 x 80 + *radical* 3^2 x 20 - *radical* 4^2 x 20 + *radical* 45 = *radical* 320 + *radical* 180 - *radical* 320 - *radical* 45 = *radicalii cu 320 se reduc* => *radical* 180 - *radical*45 = *radical* 135

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