Подставляем значения х = 4, у = -2:24^2 - 0.5(-2) + 6 = 2*16 + 1 + 6 = 32 + 1 + 6 = 39
5a^2(4a^3 - a^2 + 1) = 20a^5 - 5a^4 + 5a^2
(3c - x)(2c - 5x) = 6c^2 - 15cx - 2cx + 5x^2 = 6c^2 - 17cx + 5x^2
(3x - 5y - 2)(-7x - 1) = -21x^2 - 3x + 35xy + 5y + 14
(a + 2b + 3c)(2a - b + 2c) = 2a^2 + 4ab + 6ac - ab - 2b^2 - 2bc + 2a^2 - 4ac + 4ac = 4a^2 + 3ab + 8ac - 2b^2
(3a + 2b)^2 = 9a^2 + 4b^2 + 12ab
5x(2x + 3) - (x - 1)(x - 6) = 10x^2 + 15x - x^2 + 7x - 6 = 9x^2 + 22x - 6
(a - c)^2 - c(a - 3c) = a^2 - 2ac + c^2 - ac + 3c^2 = a^2 - 3ac + 4c^2
Дополнительная часть:
Подставляем значения х = 4, у = -2:
24^2 - 0.5(-2) + 6 = 2*16 + 1 + 6 = 32 + 1 + 6 = 39
5a^2(4a^3 - a^2 + 1) = 20a^5 - 5a^4 + 5a^2
(3c - x)(2c - 5x) = 6c^2 - 15cx - 2cx + 5x^2 = 6c^2 - 17cx + 5x^2
(3x - 5y - 2)(-7x - 1) = -21x^2 - 3x + 35xy + 5y + 14
(a + 2b + 3c)(2a - b + 2c) = 2a^2 + 4ab + 6ac - ab - 2b^2 - 2bc + 2a^2 - 4ac + 4ac = 4a^2 + 3ab + 8ac - 2b^2
(3a + 2b)^2 = 9a^2 + 4b^2 + 12ab
5x(2x + 3) - (x - 1)(x - 6) = 10x^2 + 15x - x^2 + 7x - 6 = 9x^2 + 22x - 6
(a - c)^2 - c(a - 3c) = a^2 - 2ac + c^2 - ac + 3c^2 = a^2 - 3ac + 4c^2
Дополнительная часть:
6(a - 2)(a - 3) - 4(a - 3)(a - 3) = 6(a^2 - 3a - 2a + 6) - 4(a^2 - 3a - 3a + 9) = 6(a^2 - 5a + 6) - 4(a^2 - 6a + 9) = 6a^2 - 30a + 36 - 4a^2 + 24a - 36 = 2a^2 - 6a