Question

срочно!!!!!!!!!!!
Упростите выражение (3x+1)^2-(3x-2)(2+3x)

Answer 1

$(3x + 1 {)}^{2} - (3x - 2)(2 + 3x) = 9 {x}^{2} + 6x + 1 - (3x - 2)(3x + 2) = {9x}^{2} + 6x + 1 - {9x}^{2} + 4 = 6x + 5$