b) [tex] { \sqrt{5} }^{2} + 2 \sqrt{15} x + ( \sqrt{3}x ) {}^{2} = \\ ( \sqrt{5} + \sqrt{3} x) {}^{2} [/tex]
d) [tex] {x}^{2} + 2 \sqrt{2}x + 2 = \\ (x + \sqrt{2}) {}^{2} [/tex]
f) [tex]2x {}^{2} + 2 \sqrt{6} x + 3 = \\ ( \sqrt{2} x + \sqrt{3} ) {}^{2} [/tex]
h) [tex](2 \sqrt{5} ) {}^{2} - 4 \sqrt{5} z + z {}^{2} = \\ (2 \sqrt{5} - z) {}^{2} [/tex]
