Question

Y= - x²-20x-100
podem me ajudar ​

Answer 1

Resposta:

$Y= - x^2-20x-100\\\\Y=-\left(x^2+20x+100\right)\\\\Y=-\left(x+10\right)\left(x+10\right)\\\\Y=-\left(x+10\right)^2$

Answer 2

Oie, tudo bom?

$y = - x {}^{2} - 20x - 100 \\ 0 = - x {}^{2} - 20x - 100 \\ x {}^{2} + 20x + 100 = 0 \\ x {}^{2} + 2 \: . \: x \: . \: 10 + 10 {}^{2} = 0 \\ (x + 10) {}^{2} = 0 \\ x + 10 = 0 \\ \boxed{x = - 10}$

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