Question

3x2+5root5/2 -10



solve by factorization

Answer 1

according your question

${3x}^{2} + \frac{5 \sqrt{5} }{2} - 10 = 0 \\ {3x}^{2} = - \frac{5 \sqrt{5} }{2} + 10 \\ {3x}^{2} = - \frac{5 \sqrt{5 }}{2} + \frac{20}{2}$

Answer 2

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