Question

1. Спростити вираз 1. 3x(x²-2x+3); 2) (x-7)(x+3). Срочно ​

Answer 1

Ответ:

Объяснение:

1. 3x(x²-2x+3) = 3x³-6x²+9x;

2) (x-7)(x+3)=x²+3x-7x-21 = x²-4x-21.

Answer 2

Simplifying the Expression

To simplify the expression 1. 3x(x²-2x+3) + 2(x-7)(x+3), we can start by expanding the two sets of parentheses and then combining like terms.

Expanding the first set of parentheses, we have: 3x(x²-2x+3) = 3x * x² + 3x * (-2x) + 3x * 3 = 3x³ - 6x² + 9x.

Expanding the second set of parentheses, we have: 2(x-7)(x+3) = 2 * (x * x + x * 3 - 7 * x - 7 * 3) = 2x² + 6x - 14x - 42 = 2x² - 8x - 42.

Now, we can combine the like terms: 3x³ - 6x² + 9x + 2x² - 8x - 42 = 3x³ - 4x² + x - 42.

Therefore, the simplified expression is 3x³ - 4x² + x - 42.

Let me know if you have any further questions!