PQ = \(\sqrt{(\beta - 1)^{2} + (1 - \alpha)^{2}}\) 3 = \(\sqrt{(\beta^{2} -2\beta^{2} + 1 + 1 - 2\alpha + \alpha^{2})}\) 3 = \(\sqrt{(\alpha^{2} + \beta^{2} - 2\alpha + 2\beta + 2)}\) 3 = \(\sqrt{(\alpha^{2} + \beta^{2} - 2(\alpha + \beta) + 2)}\) 3 = \(\sqrt{(\alpha^{2} + \beta^{2} - 2 * 2 + 2)}\) 3 = \(\sqrt{(\alpha^{2} + \beta^{2} - 2)}\) 9 = \(\alpha^{2} + \beta^{2} - 2)\) \(\alpha^{2} + \beta^{2}\) = 9 + 2 \(\alpha^{2} + \beta^{2}\) = 11