Question

1) 4x-3=14+x²б) 1,2-x 4/5​

Answer 1

Ответ:

1. Уравнение "4х - 3 = 14 + х²" не имеет решений.
2. Корень уравнения "1,2 - х = (4/5)" имеет один корень — 0,8.

Пошаговое объяснение:

Преобразовываем в квадратное уравнение —

4x - 3 = 14 + х², 4x - 3 - 14 - х² = 0, 4x - 17 - х² = 0, -х² + 4x - 17 = 0, х² - 4x + 17 = 0.

Далее находим дискриминант —

4² - 4 × ( - 1) × ( - 17) = 16 - 4 × 17 = 16 - 68 = -52.

Поскольку дискриминант не может быть отрицательным, данное уравнение не имеет корней.

1,2 - х = (4/5), х = 1,2 - (4/5) = 1,2 - 0,8 = 0,4.

Проверяем — 1,2 - 0,4 = 0,8.

Answer 2

It looks like you have two different mathematical expressions or equations. Let's solve each one:

1. 4x - 3 = 14 + x²

To solve this equation, you can start by moving all the terms to one side to set it equal to zero:

x² - 4x + 14 + 3 = 0

Now, combine like terms:

x² - 4x + 17 = 0

This is a quadratic equation. You can use the quadratic formula to find the solutions:

x = (-b ± √(b² - 4ac)) / (2a)

In this case, a = 1, b = -4, and c = 17. Plug these values into the formula:

x = (-(-4) ± √((-4)² - 4(1)(17))) / (2(1))

x = (4 ± √(16 - 68)) / 2

x = (4 ± √(-52)) / 2

Since the square root of a negative number is not a real number, this equation has no real solutions. If you are looking for complex solutions, you can express it as:

x = (4 ± √52i) / 2

So, the solutions are x = (4 + √52i)/2 and x = (4 - √52i)/2.

Now, for the second expression:

б) 1,2 - x 4/5

It's not entirely clear what you mean by this expression. It seems like you want to subtract x from 1.2 and then multiply the result by 4/5. If that's the case, the expression can be written as:

(1.2 - x) * (4/5)

You can leave it in this form or simplify it further depending on what you need to do with it.