Question

Помогите с заданием,срочно!!!!

Answer 1

−3x2−5−6=−(x2)−x−1−2x2

−3x2−5−6=−2x2−(x2)−x−1

−3x2−11=−2x2−(x2)−x−1

−3x2−11=−2x2−(x2)−x−1

−3x2−11=−3x2−x−1

x=10