Предмет: Алгебра, автор: kek204081

АЛГЕБРА. 2 НОМЕРА. СРОЧНО

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Автор ответа: natalia694

1

$x {}^{2} - 14 \geqslant - 5x \\ x {}^{2} - 14 + 5x \geqslant 0 \\ x {}^{2} + 5x - 14 \geqslant 0 \\$

D=25-4×1×(-14)=25+56=81

x1=(-5+9)÷2=2

x2=(-5-9)÷2= -14÷2=-7

ответ (бескон; -7] [2;бескон)

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