Question

А) (x³ + 1,3x² - 2x) - (1,3x + 2x²) Б) 4x(0,75x² - x) - 3x³ В) (3-2a)ab² - (ab - 3b)2ab

Answer 1

Ответ:

Пошаговое объяснение:

А) (x³ + 1,3x² - 2x) - (1,3x + 2x²)  = x³ + 1,3x² - 2x - 1,3x - 2x² = x³ -0,7x² - 3,3x

Б) 4x(0,75x² - x) - 3x³  = 3x³ - 4x² - 3x³ = -4x²

В) (3-2a)ab² - (ab - 3b)2ab = 3ab² - 2a²b² - 2a²b² - 6ab² = -4a²b² - 3ab²

Answer 2

А) (x^3 + 1,3x^2 - 2x) - (1,3x + 2x^2) = x^3 + 1,3x^2 - 2x - 1,3x - 2x^2 = x^3 - 0,7x^2 - 3,3x

Б) 4x (0,75x^2 - x) - 3x^3 = 3x^3 - 4x^2 - 3x^3 = -4x^2

В) (3-2a) ab^2 - (ab - 3b) 2ab = 3ab^2 - 2a^2b^2 - 6ab^2 = -4a^2b^2 - 3ab^2

Answer 3

Let's simplify the given expressions:

А) (x³ + 1.3x² - 2x) - (1.3x + 2x²)

To simplify this expression, we'll combine like terms:

x³ + 1.3x² - 2x - 1.3x - 2x²

Rearranging the terms:

x³ + 1.3x² - 2x² - 2x - 1.3x

Combining like terms:

x³ - 0.7x² - 3.3x

Therefore, the simplified form of the expression (x³ + 1.3x² - 2x) - (1.3x + 2x²) is x³ - 0.7x² - 3.3x.

Б) 4x(0.75x² - x) - 3x³

To simplify this expression, we'll distribute 4x to the terms inside the parentheses:

4x * 0.75x² - 4x * x - 3x³

Simplifying further:

3x³ - 4x² - 4x² - 3x³

Combining like terms:

-8x²

Therefore, the simplified form of the expression 4x(0.75x² - x) - 3x³ is -8x².

В) (3-2a)ab² - (ab - 3b)2ab

To simplify this expression, we'll distribute the values inside the parentheses:

(3ab² - 2aab²) - (2ab² - 6ab)

Simplifying further:

3ab² - 2aab² - 2ab² + 6ab

Combining like terms:

ab² - 2aab² + 6ab

Therefore, the simplified form of the expression (3-2a)ab² - (ab - 3b)2ab is ab² - 2aab² + 6ab.

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