[tex](a + b) {}^{2} = a {}^{2} + 2ab + b {}^{2} \\ (a - b) {}^{2} = a {}^{2} - 2ab + b {}^{2} [/tex]

[tex](c + 0.3) {}^{2} = c {}^{2} + 0.6c + 0.09[/tex]

[tex](4y + 3) {}^{2} = 16y {}^{2} + 24y + 9[/tex]