Multimea solutilor ecuatiei (2x+3)^2=...
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Răspuns:
Explicație pas cu pas:
(2x + 3)^2 = I2√3 - 5I - I2√3 - 4I
(2x + 3)^2 = 5 - 2√3 - (4 - 2√3)
(2x + 3)^2 = 5 - 2√3 - 4 + 2√3
(2x + 3)^2 = 1
2x + 3 = 1
2x = 1 - 3 = -2
x1 = -2/2 = -1
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2x + 3 = -1
2x = -1 - 3 = -4
x = -4/2 = -2
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S = {-2; -1}