Question

(2x+5)во2-(2x-3)(2x+1)=4 решите уровнение

Answer 1

4х^2+20x+25-(2x-3)(2x+1)=4
4x^2+20x-4x^2+4x+3=-21
24x+3=-21
24x=-21-3
24x=-24
x=-24:24
x=-1

Answer 2

спс