a)5y^2(y-4) + (4-y)^2 = 5y^3 - 20y^2 + (16 - 8y + y^2) = 5y^3 - 20y^2 + 16 - 8y + y^2 = 5y^3 - 19y^2 - 8y + 16
Ответ: 5y^2(y-4) + (4-y)^2 = 5y^3 - 19y^2 - 8y + 16
b)125a^3 + 150a^2b + 90ab^2 + 27b^3 = 5a(5a^2 + 6ab + 4b^2) + 9b(10b^2 + 5ab + 3b^2) = 5a(5a + 2b)(a + 2b) + 9b(3b + 5a)(3b + 2b)
Ответ: 125a^3 + 150a^2b + 90ab^2 + 27b^3 = 5a(5a + 2b)(a + 2b) + 9b(3b + 5a)(3b + 2b)
a)
5y^2(y-4) + (4-y)^2 = 5y^3 - 20y^2 + (16 - 8y + y^2) = 5y^3 - 20y^2 + 16 - 8y + y^2 = 5y^3 - 19y^2 - 8y + 16
Ответ: 5y^2(y-4) + (4-y)^2 = 5y^3 - 19y^2 - 8y + 16
b)
125a^3 + 150a^2b + 90ab^2 + 27b^3 = 5a(5a^2 + 6ab + 4b^2) + 9b(10b^2 + 5ab + 3b^2) = 5a(5a + 2b)(a + 2b) + 9b(3b + 5a)(3b + 2b)
Ответ: 125a^3 + 150a^2b + 90ab^2 + 27b^3 = 5a(5a + 2b)(a + 2b) + 9b(3b + 5a)(3b + 2b)