Question

(2х^2+х-1)^2
решите срочно

Answer 1

$(2 {x}^{2} + x - 1) ^{2} = \\ = 4 {x}^{4} + 4 {x}^{2} (x - 1) + {(x - 1)}^{2} = \\ = 4 {x}^{4} + 4 {x}^{3} - 4 {x}^{2} + {x}^{2} - 2x + 1 = \\ = 4 {x}^{4} + 4 {x}^{3} - 3{x}^{2} - 2x + 1$