Question

3 (X+7)= (x + 2)2 +15​

Answer 1

Ответ:

3(х+7)=(х+2)2+15

3х+21=2х+19

3х-2х=19-21

Х=19-21

Х= -2

Answer 2

Ответ:

x=2

Пошаговое объяснение:

Подробное решение на фото

Answer 3

Let's solve the equation $3(x + 7) = (x + 2)^2 + 15$:

1. Distribute the 3 on the left side: $3x + 21 = (x + 2)^2 + 15$

2. Expand the square on the right side: $3x + 21 = x^2 + 4x + 4 + 15$

3. Combine like terms on the right side: $3x + 21 = x^2 + 4x + 19$

4. Move all terms to one side of the equation to set it to zero: $x^2 + 4x + 19 - 3x - 21 = 0$

5. Combine like terms: $x^2 + x - 2 = 0$

Now, you can factor the quadratic equation or use the quadratic formula to find the values of $x$. In this case, the quadratic equation can be factored as $(x + 2)(x - 1) = 0$.

So, the solutions are $x = -2$ and $x = 1$.