Question

R) 19 – (3x² – 2x) – (6x – x²) = 7 – 2x²​

Answer 1

Расскрываем скобки и переносим всё в левую часть:

19-3х²+2х-6х+х²-7+2х²=0

12-4х=0

4х=12

Х=3

Ответ:3.

Answer 2

To simplify the given equation, let's start by combining like terms on both sides:

19 - (3x² - 2x) - (6x - x²) = 7 - 2x²

Distribute the negative sign inside the parentheses:

19 - 3x² + 2x - 6x + x² = 7 - 2x²

Rearrange the terms:

19 + 2x - 6x - 3x² + x² = 7 - 2x²

Combine like terms:

(2x - 6x) + (x² - 3x²) + (19 - 7) = -2x² - x²

-4x + (-2x²) + 12 = -3x²

Combine like terms again:

-3x² - 2x² - 4x + 12 = 0

Combine the x² terms and the x terms:

-5x² - 4x + 12 = 0

So the simplified form of the equation is -5x² - 4x + 12 = 0.