[tex]d = (3x - 2) {}^{2} \\ (3x) {}^{2} - 2 \times 3x \times 2 + 2 {}^{2} \\ = 9x {}^{2} - 12x + 4[/tex]
[tex]e = (x - 2)(x + 2) \\ = x {}^{2} - 2 {}^{2} \\ = x {}^{2} - 4[/tex]
[tex]f = (3x - 4)(3x + 4) \\ (3x) {}^{2} - 4 {}^{2} \\ 9x {}^{2} - 16[/tex]
[tex]b = (2x + 6) {}^{2} \\ = (2x) {}^{2} + 2 \times 2x \times 6 + 6 {}^{2} \\ = 4x {}^{2} + 24x + 36[/tex]
[tex]a = (x + 3) {}^{2} \\ = x { + 2 \times }x \times 3 + 3 {}^{2} \\ = x {}^{2} + 6x + 9 [/tex]
[tex]c = (x - 5) {}^{2} \\ = x {}^{2} - 2 \times x \times 5 {}^{2} \\ x {}^{2} - 10x + 25[/tex]
❤❤
