Question

(2,1-х)(х+2,1)-(5-х)(х+5)=-20,59​

Answer 1

Ответ:

2,1^2-x^2-(5^2-x^2)=20,59

2,1^2-x^2-5^2+x^2=20,59(x^2 взаимоуничтожаются)

2,1^2-25=20,59 (не равно)

значит корней нет

Объяснение:

Answer 2

To solve the equation (2.1 - x)(x + 2.1) - (5 - x)(x + 5) = -20.59, you can follow these steps:

1. First, expand the expressions on both sides of the equation:

(2.1 - x)(x + 2.1) - (5 - x)(x + 5) = -20.59

Expanding the first term:

(2.1 * x + 2.1 * 2.1 - x * x - 2.1 * x) - (5 * x + 5 * 5 - x * x - 5 * x) = -20.59

2. Simplify the expressions within the parentheses:

(2.1 * x + 4.41 - x * x - 2.1 * x) - (5 * x + 25 - x * x - 5 * x) = -20.59

3. Combine like terms within each expression:

(2.1 * x - 2.1 * x + 4.41 - x * x + x * x) - (5 * x - 5 * x + 25 - x * x) = -20.59

4. Cancel out the terms that simplify to 0:

(4.41) - (25) = -20.59

5. Continue simplifying:

4.41 - 25 = -20.59

6. Subtract 25 from both sides of the equation:

4.41 - 25 - 25 = -20.59 - 25

-20.59 - 25 = -45.59

So, the equation -45.59 = -45.59 is true.

Therefore, the equation (2.1 - x)(x + 2.1) - (5 - x)(x + 5) = -20.59 has a solution for all values of x, and the solution is x = any real number.