Question

х×2.5х=25
$x \times 2.5x = 250$
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Answer 1

$x \times 2.5x = 25$

$2.5x {}^{2} = 25$

$\frac{5}{2} x {}^{2} = 25$

$x {}^{2} = 10$

$x1 = - \sqrt{10}$

$x 2 = \sqrt{10}$