Ответ:
Объяснение:
1.
a) -7mkn + 3m^3kn = kmn(3m^2 - 7)
б) (-5mnm^2n + mk^2m) / 5 = m^2(-5mn^2 + k^2) / 5 =
= -n^2m^3 + (km)^2 / 5
2.
а) 1 - 3x^2 - x^2 + 1 = 2 - 3x^2 - x^2 = 2 - 4x^2 = 2(1 - 2x^2)
б) 3b + c^2 -d - c^2 + 2d = 3b + d
3.
3ab + 9a + cb + 3c = (3 * (-0,2) * (1.03)) + (1,6 * 1,03 + 3 * 1,6) =
= -0,618 + 1,648 + 4,8 = 1,03 + 4,8 = 5,83
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Answers & Comments
Ответ:
Объяснение:
1.
a) -7mkn + 3m^3kn = kmn(3m^2 - 7)
б) (-5mnm^2n + mk^2m) / 5 = m^2(-5mn^2 + k^2) / 5 =
= -n^2m^3 + (km)^2 / 5
2.
а) 1 - 3x^2 - x^2 + 1 = 2 - 3x^2 - x^2 = 2 - 4x^2 = 2(1 - 2x^2)
б) 3b + c^2 -d - c^2 + 2d = 3b + d
3.
3ab + 9a + cb + 3c = (3 * (-0,2) * (1.03)) + (1,6 * 1,03 + 3 * 1,6) =
= -0,618 + 1,648 + 4,8 = 1,03 + 4,8 = 5,83