Question

ПОМОГИТЕ, ДАЮ 20 БАЛЛОВ

Answer 1

Ответ:   №2 .

$2x^2+\dfrac{1}{5}\, x+2=-x^2-\dfrac{6}{5} \, x-2\\\\\\3x^2+\dfrac{7}{5}\, x+4=0\ \ ,\ \ \ 3\cdot \Big(x^2+\dfrac{7}{15}\, x\Big)+4=0\\\\\\\displaystyle 3\cdot \left(\Big(x+\frac{7}{30}\Big)^2-\frac{49}{900}\right)+4=0\\\\\\3\cdot \Big(x+\frac{7}{30}\Big)^2-\frac{49}{300}+4=0\\\\\\3\cdot \Big(x+\frac{7}{30}\Big)^2+\frac{1151}{300}=0$