Question
समीकरण $\log ( - 2x)$ $ = 2\log (x + 1)$ के मूलों की संख्या होगी
$ \Rightarrow - 2x = {(x + 1)^2}$ $ \Rightarrow {x^2} + 4x + 1 = 0$
$\Rightarrow$ $x = \frac{{ - 4 \pm \sqrt {16 - 4} }}{2}$ $⇒ x = \frac{{ - 4 \pm \sqrt {12} }}{2}$
$\Rightarrow$ $x = - 2 \pm \sqrt 3 $ $⇒ x = ( - 2 + \sqrt 3 ),( - 2 - \sqrt 3 )$.
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