Question

Найдите корень уровненная

Answer 1

$( 7-x )^2 = ( x + 16)^2$

$( 7 - x)^2 - ( x + 16 )^2 = 0$

$( 7 - x - (x+16) )\cdot ( 7 - x + x + 16) = 0$

$(7 - x - x - 16)\cdot (7+16) = 0$

$(-9-2x)\cdot 23 = 0$

$-9-2x = 0$

$2x = -9$

$x = \frac{-9}{2} = -4{,}5$