Question

(x-3)×(x-7)-2x×(3x-5)​

Answer 1

Ответ:

Пошаговое объяснение:

(x-3)×(x-7)-2x×(3x-5)​ = x² - 7x - 3x + 21 - 6x² + 10x = -5x² + 21

Answer 2

To simplify the expression $(x-3)(x-7) - 2x(3x-5)$, let's follow these steps:

1. Distribute the terms inside each set of parentheses: $(x-3)(x-7) = x^2 - 7x - 3x + 21 = x^2 - 10x + 21$ $2x(3x-5) = 6x^2 - 10x$

2. Subtract the second expression from the first: $x^2 - 10x + 21 - (6x^2 - 10x)$

3. Simplify further: $x^2 - 10x + 21 - 6x^2 + 10x$

4. Combine like terms: $-5x^2 + 21$

So, $(x-3)(x-7) - 2x(3x-5) = -5x^2 + 21$.