Question

Alguien me ayuda? Por favor:(((

Answer 1

    $1-2x\le \left(x+5\right)^2-2\left(x+1\right)\\\\-10x-22-x^2\le \:0\\\\-\left(x+5\right)^2+3\le \:0\\\\-\left(x+5\right)^2+3-3\le \:0-3\\\\-\left(x+5\right)^2\le \:-3\\\\\left(-\left(x+5\right)^2\right)\left(-1\right)\ge \left(-3\right)\left(-1\right)\\\\\left(x+5\right)^2\ge \:3$

• Ojito.- "$u^n\:\ge \:\:a$" es par, por lo tanto "$u\:\le \:\:-\sqrt[n]{a}\:,\:u\:\ge \sqrt[n]{a}$"

    $x+5\le \:-\sqrt{3}\quad \mathrm{or}\quad \:x+5\ge \sqrt{3}\\\\x\le \:-\sqrt{3}-5\quad \mathrm{or}\quad \:x\ge \sqrt{3}-5$

• Numerico.-
• Saludos, suerte.