5у^2 +у +у^3+5 = (5у^2+5) + (y+y^3) = 5(y^2+1) + y(y^2+1) = (y^2+1)(5+y)
а) 5y²+y+y³+5=5(y²+1)+y(1+y²)=(5+y)(y²+1)
б) y³-4+2y-2y=y²(y-2)+2(y-2)=(y-2)(y²+2)
в) z³+21+3z+7z²=3(7+z)+z²(7+z)=(7+z)(3+z²)
г) z-3z²+z³-3=z(1+z²)-3(z²+1)=(z-3)(1+z²)
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5у^2 +у +у^3+5 = (5у^2+5) + (y+y^3) = 5(y^2+1) + y(y^2+1) = (y^2+1)(5+y)
а) 5y²+y+y³+5=5(y²+1)+y(1+y²)=(5+y)(y²+1)
б) y³-4+2y-2y=y²(y-2)+2(y-2)=(y-2)(y²+2)
в) z³+21+3z+7z²=3(7+z)+z²(7+z)=(7+z)(3+z²)
г) z-3z²+z³-3=z(1+z²)-3(z²+1)=(z-3)(1+z²)