Question

X+(x + 3) *(x-7)=0 ​

Answer 1

Ответ:

93 :)))))))))))))))))))))))))

Answer 2

To solve the equation $X+(X + 3) \cdot (X-7) = 0$, we can follow these steps:

Step 1: Expand the expression: $X + (X + 3)(X - 7) = 0$ $X + (X^2 - 7X + 3X - 21) = 0$ $X + (X^2 - 4X - 21) = 0$ $X + X^2 - 4X - 21 = 0$

Step 2: Combine like terms: $X^2 - 3X - 21 = 0$

Step 3: Solve the quadratic equation. We can use the quadratic formula: For a quadratic equation in the form $ax^2 + bx + c = 0$, the solutions are given by: $x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$

In our equation, $a = 1$, $b = -3$, and $c = -21$. Substituting these values into the quadratic formula, we get:

$X = \frac{-(-3) \pm \sqrt{(-3)^2 - 4 \cdot 1 \cdot (-21)}}{2 \cdot 1}$

$X = \frac{3 \pm \sqrt{9 + 84}}{2}$

$X = \frac{3 \pm \sqrt{93}}{2}$

Therefore, the solutions to the equation $X+(X + 3) \cdot (X-7) = 0$ are: $X = \frac{3 + \sqrt{93}}{2}$ and $X = \frac{3 - \sqrt{93}}{2}$.