Question

(8a-3b)(8a+3b)-(1,3a+b)(3a-2b) упростить решение

Answer 1

$(8a-3b)(8a+3b) -(1,3a+b)(3a-2b) = 64a^2 - 9b^2 - (3,9a^2 - 2,6ab + 3ab - 2b^2) =\\\\= 64a^2 - 9b^2 - 3,9a^2 + 2,6ab - 3ab + 2b^2 = \boxed{60,1a^2 - 0,4ab - 7b^2}$