Question

Упростите выражение 1. (3х^2-2x)+(-x^2+3x) 2. (4c^2-cd)-(10c^2+8cd) 3. (12m^2-7n-3mn)-(6mn-10n+14m^2) 4. (3n^3-2mn+4m^3)-(2mn+3n^ 3) Решите уравнение 1. (5x^2-3)-(2x+5)=5x^2 2. x^2-(x+1)-(x^2-7x+32)=3 3. (y^3+3y-8)-(5y-y^3+7)=2y^3-2y-15

Answer 1

Решение смотри на фотографии

Answer 2

Упростите выражение

1. (3х^2-2x)+(-x^2+3x)+2 2. (4c^2-cd)-(10c^2+8cd) 3. (12m^2-7n-3mn)-(6mn-10n+14m^2) 4. (3n^3-2mn+4m^3)-(2mn+3n^2+3)

Решение:

1. (3х^2-2x)+(-x^2+3x)+2 = 3х^2 - 2x - x^2 + 3x + 2 = 2х^2 + x + 2

2. (4c^2-cd)-(10c^2+8cd) = 4c^2 - cd - 10c^2 - 8cd = -6c^2 - 9cd

3. (12m^2-7n-3mn)-(6mn-10n+14m^2) = 12m^2 - 7n - 3mn - 6mn + 10n - 14m^2 = -2m^2 - 9mn + 3n

4. (3n^3-2mn+4m^3)-(2mn+3n^2+3) = 3n^3 - 2mn + 4m^3 - 2mn - 3n^2 - 3 = 3n^3 + 4m^3 - 4mn - 3n^2 - 3

Решите уравнение

1. (5x^2-3)-(2x+5)=5x^2+2 2. x^2-(x+1)-(x^2-7x+32)=3 3. (y^3+3y-8)-(5y-y^3+7)=2y^3-2y-15

Решение:

1. (5x^2-3)-(2x+5)=5x^2+2 = 5x^2 - 3 - 2x - 5 = 5x^2 + 2 = 5x^2 - 2x - 8 = 5x^2 + 2 Since the left and right sides of the equation are not equal, there is no solution for this equation.

2. x^2-(x+1)-(x^2-7x+32)=3 = x^2 - x - 1 - x^2 + 7x - 32 = 3 = -x - 33 = 3 = -x = 3 + 33 = -x = 36 = x = -36 So, the solution for this equation is x = -36.

3. (y^3+3y-8)-(5y-y^3+7)=2y^3-2y-15 = y^3 + 3y - 8 - 5y + y^3 - 7 = 2y^3 - 2y - 15 = 2y^3 - 2y^3 - 5y + 3y - 8 - 7 + 15 = -2y - 15 = -2y + 3 = -2y - 15 Since the left and right sides of the equation are not equal, there is no solution for this equation.