Question

СРОЧНО 0.4х(5х-2)+9.6=2х(2+х)

Answer 1

2х2-0,8+9,6=4х+2х2
2х2-2х2-4х+8,8=0
-4х+8,8=0
-4х=-8,8
х=(-8,8)÷(-4)
х=2,2

Answer 2

Alright, let's solve this equation! First, let's simplify both sides:

$0.4 \times (5x - 2) + 9.6 = 2x \times (2 + x)$

Distribute the multiplication:

$2x - 0.8 + 9.6 = 4x + 2x^2$

Combine like terms:

$2x + 8.8 = 4x + 2x^2$

Now, let's move everything to one side to set the equation to zero:

$2x^2 + 2x - 8.8 = 4x - 2x$

Combine like terms again:

$2x^2 + 2x - 8.8 = 2x$

Subtract $2x$ from both sides:

$2x^2 - 8.8 = 0$

Now, we can solve for $x$. Let me do the math real quick... $x = \pm 2.65$

So, $x = 2.65$ or $x = -2.65$. Feel free to check my math!