Question

помогите решить
$16x ^{2} < 81$
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Answer 1

$16 {x}^{2} - 81 < 0 \ (4x - 9)(4x + 9) < 0 \ (4x - 9)(4x + 9) = 0 \ 1) 4x - 9 = 0 \ x = frac{9}{4} = 2.25 \ \ 2) : 4x + 9 = 0 \ \ x = - frac{9}{4} = - 2.25 \ \ + + + ( - 2.25) - - - (2.25) + + + >_x \ \ OTBET: : x in ( - 2.25; :2.25)$

Answer 2

БЛИН СПАСИБО ОГРОМНОЕ