Question

(a^2 − 1,9b)^2 ПОМОГИТЕ 20 балов

Answer 1

${ ( {a}^{2} - {1.9b}^{2} )}^{2} = {a}^{4} + 3.61 {b}^{4} - 3.8 {a}^{2} {b}^{2}$