Solve the equation: the square of 2x + X + 3 = 0

2X & # 178; + X + 3 = 0,2 (X & # 178; + 2 · x · & # 188; + (& # 188;) & # 178;) = - 3 + (1 / 8). 2 (x + & # 188;) & # 178; = - 23 / 8. (x + & # 188;) & # 178; = - 23 / 16

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