Вариант 1:а) (у+4)(у-2) = у^2 + 4у - 2у - 8 = у^2 + 2у - 8б) (3x-5)(2x+9) = 6x^2 + 27x - 10x - 45 = 6x^2 + 17x - 45в) (m+1)(m^2-m+3) = m^3 - m^2 + 3m + m^2 - m + 3 = m^3 + 2m + 3г) (-c-3)(c+1) = -c^2 - 3c + c + 3 = -c^2 - 2c + 3д) (11a-4)(3-2a) = 33 - 22a - 12a + 8a^2 = 8a^2 - 34a + 33e) (x-t)(x^2+2xt-3t^2) = x^3 + 2x^2t - 3xt^2 - tx^2 - 2t^2x + 3t^3 = x^3 - tx^2 + 2x^2t - 5xt^2 + 3t^3
Вариант 2:а) (t-3)(t+5) = t^2 + 5t - 3t - 15 = t^2 + 2t - 15б) (4x-7)(3x-8) = 12x^2 - 32x - 21x + 56 = 12x^2 - 53x + 56в) (v-2)(vg+3v-4) = v^2g + 3v^2 - 4v - 2vg - 6v + 8 = v^2g + 3v^2 - 2vg - 10v + 8г) (p+7)(-n-4) = -np - 4p + 7n + 28 = -np - 4p + 7n + 28д) (13p-1)(13p+1) = 169p^2 + 13p - 13p - 1 = 169p^2 - 1e) (a+b)(a^2-ab+b^2) = a^3 - a^2b + ab^2 + ab^2 - ab^2 + b^3 = a^3 + b^3
Вариант 1:
а) (у+4)(у-2) = у^2 + 4у - 2у - 8 = у^2 + 2у - 8
б) (3x-5)(2x+9) = 6x^2 + 27x - 10x - 45 = 6x^2 + 17x - 45
в) (m+1)(m^2-m+3) = m^3 - m^2 + 3m + m^2 - m + 3 = m^3 + 2m + 3
г) (-c-3)(c+1) = -c^2 - 3c + c + 3 = -c^2 - 2c + 3
д) (11a-4)(3-2a) = 33 - 22a - 12a + 8a^2 = 8a^2 - 34a + 33
e) (x-t)(x^2+2xt-3t^2) = x^3 + 2x^2t - 3xt^2 - tx^2 - 2t^2x + 3t^3 = x^3 - tx^2 + 2x^2t - 5xt^2 + 3t^3
Вариант 2:
а) (t-3)(t+5) = t^2 + 5t - 3t - 15 = t^2 + 2t - 15
б) (4x-7)(3x-8) = 12x^2 - 32x - 21x + 56 = 12x^2 - 53x + 56
в) (v-2)(vg+3v-4) = v^2g + 3v^2 - 4v - 2vg - 6v + 8 = v^2g + 3v^2 - 2vg - 10v + 8
г) (p+7)(-n-4) = -np - 4p + 7n + 28 = -np - 4p + 7n + 28
д) (13p-1)(13p+1) = 169p^2 + 13p - 13p - 1 = 169p^2 - 1
e) (a+b)(a^2-ab+b^2) = a^3 - a^2b + ab^2 + ab^2 - ab^2 + b^3 = a^3 + b^3