Question

Упростите выражение
a) -0,2x(3x^2+7)(2-4x^2)
б) 3с(с-2)-(с-3)(с-1)

Answer 1

а) -0,2x (3x² + 7)(2 - 4x²) = (-0,6x³ - 1,4x)(2 - 4x²) = -1,2x³ + 2,4^5 - 2,8x + 5,6x³ = 4,4x³ + 2,4x^5 - 2,8x

б) 3c (c - 2) - (c - 3)(c - 1) = 3c² - 6c - (c² - c - 3c + 3) = 3c² - 6c - (c² - 4c + 3) = 3c² - 6c - (c² - 4c + 3) = 3c² - 6c - c² + 4c - 3 = 2c² - 2c - 3