Question

Help me плиииз!!♡x²+3x=5x+15​

Answer 1

х² + 3х = 5х + 15

х² + 3х - 5х - 15 = 0

х² - 2х - 15 = 0

D = b² - 4ac = (-2)² - 4 · 1 · (-15) = 4 + 60 = 64

√D = √64 = 8

х₁ = (2-8)/(2·1) = (-6)/2 = -3

х₂ = (2+8)/(2·1) = 10/2 = 5

Ответ: (-3; 5).

Answer 2

Ответ:

Пошаговое объяснение:

Answer 3

Of course, I can help you solve the equation $x^2 + 3x = 5x + 15$. Let's start by simplifying the equation and then solving for $x$.

First, move all the terms involving $x$ to one side of the equation and the constant terms to the other side:

$x^2 + 3x - 5x - 15 = 0$

Now, combine like terms:

$x^2 - 2x - 15 = 0$

To solve this quadratic equation, you can use factoring, completing the square, or the quadratic formula. In this case, let's use factoring. We need to find two numbers that multiply to -15 and add up to -2. These numbers are -5 and 3. So, the equation can be factored as follows:

$(x - 5)(x + 3) = 0$

Now, set each factor equal to zero and solve for $x$:

$x - 5 = 0 \Rightarrow x = 5$

$x + 3 = 0 \Rightarrow x = -3$

Therefore, the solutions to the equation $x^2 + 3x = 5x + 15$ are $x = 5$ and $x = -3$.