1)а,в,г,е,и
2)а)y^2-y^2=0
б)16-b^2=(4-b)*(4+b)
в)1-а^2=(1-а)*(1+а)
г)4/9-х^2=(2/3 - х)*(2/3 + х)
1.a,в,г,е,и 2. а)у²-у²=(y-y)(y+y)=0 б)16-b²=(4-b)(4+b) в)1-а²=(1-а)(1+а) г)4/9-x²=(2/3-x)(2/3+x)
1)а,в,г,е,и
2)а)y^2-y^2=0
б)16-b^2=(4-b)*(4+b)
в)1-а^2=(1-а)*(1+а)
г)4/9-х^2=(2/3 - х)*(2/3 + х)
1.a,в,г,е,и 2. а)у²-у²=(y-y)(y+y)=0 б)16-b²=(4-b)(4+b) в)1-а²=(1-а)(1+а) г)4/9-x²=(2/3-x)(2/3+x)