Math, asked by rosey5, 7 months ago

Factorise 3x^2+7√5-30

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Answered by McPhoenix

$3x^{2} + 7\sqrt{5} - 30\\\\3x^{2} + 9\sqrt{5}x - 2\sqrt{5}x - 30\\\\3x(x + 3\sqrt{5}) - 2\sqrt{5}(x + 3\sqrt{5})\\\\(3x - 2\sqrt{5}) (x +3\sqrt{5})\\\\x = -3\sqrt{5} \\\\x = \frac{2\sqrt{5} }{3}$

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Factorise 3x^2+7√5-30​

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Factorise 3x^2+7√5-30