а) (5+х)^{2} = 25 + 10x + x^{2}б) (1-3х)^{2} = 1 - 6x + 9x^{2}в)(3а-10b)^{2} = 9а^{2} - 60ab + 100b^{2}г)(х^{2}+4)^{2} = x^{4} + 8x^{2} + 16д)(у+15)^{2} = у^{2} + 30у + 225е)(5х-0,2)^{2} = 25х^{2} - 2х + 0.04ё)(-2а+7b)^{2} = 4а^{2} - 28ab + 49b^{2}ж)(а^{3}+b^{4})^{2} = а^{6} + 2а^{3}b^{4} + b^{8}
а) (5+х)^{2} = 25 + 10x + x^{2}
б) (1-3х)^{2} = 1 - 6x + 9x^{2}
в)(3а-10b)^{2} = 9а^{2} - 60ab + 100b^{2}
г)(х^{2}+4)^{2} = x^{4} + 8x^{2} + 16
д)(у+15)^{2} = у^{2} + 30у + 225
е)(5х-0,2)^{2} = 25х^{2} - 2х + 0.04
ё)(-2а+7b)^{2} = 4а^{2} - 28ab + 49b^{2}
ж)(а^{3}+b^{4})^{2} = а^{6} + 2а^{3}b^{4} + b^{8}