[tex]a) {x}^{2} - {4}^{2} = {x}^{2} - 16 \\ b) {5}^{2} - {x}^{2} = 25 - {x }^{2} \\ c) {(2 \sqrt{5}) }^{2} - {( \sqrt{3} )}^{2} = 20 - 3 = 17 \\ [/tex]
[tex]2)a)8x + 24 \\ b) - 8 - 2x \\ c) - 50 + 5x [/tex]
[tex]d) - 12x - 24y = - 12(x + 2y) \\ e) - 21x + 15 \\ f) - 4x +56y \\ g)14x - 63y [/tex]
[tex]h)45x + - 27 [/tex]
