Question

упрожнение 187 пример4

Answer 1

х= минус 2 ден 5. ,,,

Answer 2

x^2+8x+16-(x^2-4)=0
x^2+8x+16-x^2+4=0
8x+20=0
8x= -20
x=  -20/8= -5/2= -2,5