X²+2√3X+3=0

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X²+2√3X+3=0
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X²+2√3X+3=0
X²+2√3X+3=0

X²+2√3X+3=0
x ² + 2√3 x + 3 = 0
x ² + 2√3 x + (√3)² = 0
(x + √3)² = 0
x + √3 = 0
x = - √3

X²+2√3X+3=(x+2√3)^2=0
x=-2√3

负根号3。你把3看成是根号3的平方,其实这式子就是X加上根号3的完全平方了

(x+√3)²=0
x=-√3