\[\boxed{\mathbf{963.ОК\ ГДЗ - домашка\ на}\ 5}\]
\[x^{2} + y^{2} = 25\]
\[\textbf{а)}\ x = - 4:\]
\[( - 4)^{2} + y^{2} = 25;\]
\[16 + y^{2} = 25;\]
\[y^{2} = 9;\]
\[y = \pm 3.\]
\[A( - 4;3)\ и\ B( - 4; - 3).\]
\[\textbf{б)}\ y = 3:\]
\[x^{2} + 9 = 25;\]
\[x^{2} = 16;\]
\[x^{2} = \pm 4.\]
\[C(4;3)\ и\ D( - 4;3).\]
\[\boxed{\mathbf{963.еуроки - ответы\ на\ пятёрку}}\]
\[1)\mathbf{\ }\mathbf{Построим\ вектроры\ }\overrightarrow{p},\overrightarrow{q}.\]
\[2)\mathbf{\ Построим\ векторы\ }2\overrightarrow{p}\ и\frac{1}{2\overrightarrow{q}}.\]