Question

x square - 3 under root 5 x minus 20​

Answer 1

$\huge\text{\red{\underline{\underline{Answer:-}}}}$

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$x{}^{2}-3\sqrt{5}-20$

$x{}^{2}-(4\sqrt{5}-\sqrt{5})x-20$

$x{}^{2}-4\sqrt{5}x+\sqrt{5}x-20$

$x(x-4\sqrt{5})+\sqrt{5}(x-4\sqrt{5})$

$(x-4\sqrt{5}) (x+\sqrt{5})$

Hope it's help uh

Answer 2

Here Is Your Ans ⤵

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$= > {x}^{2} - 3 \sqrt{5} - 20 = 0 \\ = > {x}^{2} - 4 \sqrt{5} x - \sqrt{5} x - 20 = 0 \\ = > x(x - 4 \sqrt{5}) + \sqrt{5} (x - 4 \sqrt{5} ) = 0\\ \\ = > x = - \: 4 \sqrt{5} \: \: or \: \: x = - \: \sqrt{5}$

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