Question

Exercitiul 5
punctul c va rog

Answer 1

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Answer 2

Folosim formula (a+b)² = a²+2ab +b² =>

x² + 2√3 x + 3 = 27

x² + 2√3x -24 = 0

a = 1, b = 2√3, c = -24

Delta = b²-4ac = 2²*√3² - 4*1*(-24) = 4*3 + 96 = 12+96 = 108

√108 = 6√3

x1 = (-b + √delta)/2a = (-2√3 + 6√3)/2 = 4√3 / 2 = 2√3

x2 = (-b - √delta)/2a = (-2√3 - 6√3)/2 = -8√3 / 2 = -4√3