887. Упростите: a) (x - y)(x + y)(x² + y²); б) (2a + b)(4a² + b²)(2a - b); в) (c³+b)(c³ - b)(c⁶ + b²); г) (3m - 2)(3m+2)+ д) 25п² - (7+5n)(7- e) 6x² - (x -0,5)(x +

a) \((x - y)(x + y)(x^2 + y^2) = (x^2 - y^2)(x^2 + y^2) = x^4 - y^4\) б) \((2a + b)(2a - b)(4a^2 + b^2) = (4a^2 - b^2)(4a^2 + b^2) = 16a^4 - b^4\) в) \((c^3 + b)(c^3 - b)(c^6 + b^2) = (c^6 - b^2)(c^6 + b^2) = c^{12} - b^4\) г) \((3m - 2)(3m+2) = 9m^2 - 4\) д) \(25n^2 - (7+5n)(7-5n) = 25n^2 - (49 - 25n^2) = 25n^2 - 49 + 25n^2 = 50n^2 - 49\) e) 6x² - (x -0,5)(x+0.5) =6x^2 -(x^2-0.25)=5x^2 + 0.25 Ответ: a) \(x^4 - y^4\) б) \(16a^4 - b^4\) в) \(c^{12} - b^4\) г) \(9m^2 - 4\) д) \(50n^2 - 49\) е) \(5x^2 + 0.25\)