Question

раздожите на множители(7x-3x^3)^2​

Answer 1

$(7x-3x^3)^2=\Big (x\cdot (7-3x^2)\Big )^2=x^2\cdot (7-3x^2)^2=\\\\=x^2\cdot (\sqrt7-\sqrt3x)^2\cdot (\sqrt7+\sqrt3x)^2$