Question

решите уровнение (5х-3) (5х+3) - (4х-5) в кводрате = 4х-34

Answer 1

(5x-3)(5x+3)-(4x-5)^2 =4x-34
25x-9-(4x-5)(4x-5)=4x-34
25x-4x+4x-4x=9+34
21x=42
x=2