Очень прошу, сделайте, надо

49-x²+3x²-11x-34=0 2x²-11x+15=0 d=b²-4ac d=121-120=1 x₁=-b+√d/2a=11+1/4=3 x₂=-b-√d/2a=10/4=5/2 ответ х₁=3, х₂=5/3

(7-x) (7+x)+3x²=11x+3414+7х-7х-2х+9х=11+347х-7х-2х+9х-11х=34-14-4х=20х=-5

Вотэто понятно это Сурин

Вот держи.Тут про продавца и ассистента

He is told something interesting every day.
Yesterday near my home a tree was fallen down. I saw to the window when it happened.
Very important questions will be discussed at a meeting tomorrow.
I  am often invited to the cinema.