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4. Calculaţi: a) 4(3√3-1)-5(√3-4)²-√768; b) 3(2√2+1) +2(√2-3) -(8-√7)(8+√7); 6(√2+3)+4(3√2-1)-√288; c) d) (√6 + 2)² + (√3-2√2)²-(√10 − √3)(√10 + √3); e) (√7-2)² + 2(√7+1)² + (√7-3)(√7+3).​


dau 100 puncte


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