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exercitiul 21 subpunctul d)

Exercitiul 21 Subpunctul D class=

Răspuns :


d)(2√5x+3√3y)(√5x-2√3y)+(√27-20y)(2√48+√45)=
2√25x²-4√15xy+3√15xy-6√9y²+2√1296x²+√1215xy-2√960xy-√900xy=
2√25x²-4√15xy+3√15xy-18y²+2√1296x²+√1215xy-2√960xy-30xy
10x²-√15xy-18y²+2√1296x²+√1215xy-2√960-30xy

succes