Question

4x(x+3)-(2x+5)(2x-5)=0

Answer 1

4х(х+3)-(2х+5)(2х-5)=0

4х²+12х-4х²+25=0

12х+25=0

12х= -25

х= -25:12

х= -2,08(3)

Ответ: -2,08(3)