Question

- 3х^ + 7 при = - 5​

Answer 1

Ответ:

-3х²+7 при х =-5

-3*(-5²)+7=-3*25+7=-75+7=-68

Пошаговое объяснение:

Answer 2

It seems like you want to solve the equation:

-3x^2 + 7 = -5

To solve for x, follow these steps:

1. Start by moving the constant term (-5) to the other side of the equation by adding 5 to both sides:

-3x^2 + 7 + 5 = -5 + 5

This simplifies to:

-3x^2 + 12 = 0

2. Now, we want to isolate x^2. To do that, divide both sides of the equation by -3:

(-3x^2 + 12) / -3 = 0 / -3

This simplifies to:

x^2 - 4 = 0

3. To solve for x^2, add 4 to both sides of the equation:

x^2 - 4 + 4 = 0 + 4

This simplifies to:

x^2 = 4

4. To solve for x, take the square root of both sides. Remember that there are two possible solutions, one positive and one negative:

x = ±√4

x = ±2

So, the solutions to the equation are:

x = 2 and x = -2