Question

Помогите пожалуйста очень срочно прошу вас

Answer 1

${(x - 3)}^{2} - 8 = {x}^{2} - 6x + 9 - 8 = {x}^{2} - 6x + 1$

${(2a + 3b)}^{2} - 4a( a - 6b) = {4a}^{2} + 12ab + {9b}^{2} - {4a}^{2} + 24ab = {9b}^{2} + 36ab$

$(3a - 2b)(3a + 2b) - {(a + 3b)}^{2} = {9a}^{2} - {4b}^{2} - ( {a}^{2} + 6ab + {9b}^{2} ) = {9a}^{2} - {4b}^{2} - {a}^{2} - 6ab - {9b}^{2} = {8a}^{2} - {13b}^{2} - 6ab$