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3.(5+√7)(5-√7)
15+3√7+5-√7
15+5+3√7-√7
20+2√7
x²+y²=
(5+√7)²+(5-√7)²
(25+√49)+(25-√49)
(25+7)+(25-7)
32+18=50
nek bener jadiin yang terbaik ya:D
maaf klo slh