Question

3(x•3)=x+2(x15) решите пожалуйста

Answer 1

Нужно раскрыть скобки в первой и второй частях : получится 3·х·3= х+ 2·х·15
считаем : 9х=х+30х = 31х
т.е. 31х=9х
х=0

Answer 2

Solving the Equation

To solve the equation 3(x•3)=x+2(x15), we can follow these steps:

1. Expand and simplify the equation. 2. Solve for the variable x.

Step 1: Expand and Simplify

First, let's expand and simplify the equation 3(x•3)=x+2(x15).

The expression x•3 can be interpreted as x multiplied by 3.

So, the equation becomes: 3x^2 = x + 2(x+15).

Step 2: Solve for x

Now, let's solve for the variable x.

To solve for x, we'll follow these steps: 1. Expand the expression 2(x+15). 2. Combine like terms. 3. Set the equation equal to zero and solve for x.

Expanding 2(x+15) gives us 2x + 30.

So, the equation becomes: 3x^2 = x + 2x + 30.

Combining like terms gives us: 3x^2 = 3x + 30.

Subtracting 3x and 30 from both sides gives us: 3x^2 - 3x - 30 = 0.

Now, we have a quadratic equation in the form ax^2 + bx + c = 0.

We can solve this quadratic equation using the quadratic formula: x = (-b ± √(b^2 - 4ac)) / (2a).

Let's calculate the values of x using the quadratic formula.

Solution

Using the quadratic formula, the solutions for x are:

x = (-(-3) ± √((-3)^2 - 4*3*(-30))) / (2*3).

Solving further gives us: x = (3 ± √(129)) / 6.

Therefore, the solutions for x are: x = (3 + √(129)) / 6 and x = (3 - √(129)) / 6.

These are the solutions for the given equation 3(x•3)=x+2(x15).