Question

3x² + 0,9 = 0 4x² - 5x = 0

Answer 1

Объяснение:

3х2=-0,9

х2=-0,3

нет корней, т.к отрицательное число не может стоять под корнем.

4х2-5х=0

х(4х-5)=0

х=0

либо

4х-5=0

4х=5

х=5/4 (1,25)

Answer 2

Ответ:

3х2= -0,9

х2=-0,3

нет корней

х(4х-5)=0

х1=0 или 4х=5

х2=5/4

Answer 3

To solve the equations 3x² + 0.9 = 0 and 4x² - 5x = 0, we'll first isolate x for each equation. Let's start with the first equation:

1. 3x² + 0.9 = 0

Subtract 0.9 from both sides:

3x² = -0.9

Now, divide both sides by 3 to isolate x²:

x² = -0.9 / 3 x² = -0.3

Take the square root of both sides:

x = ±√(-0.3)

Since you can't take the square root of a negative number within the real number system, the first equation has no real solutions.

Now, let's solve the second equation:

2. 4x² - 5x = 0

Factor out the common term (x):

x(4x - 5) = 0

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

a. x = 0

b. 4x - 5 = 0 4x = 5 x = 5/4

So, the solutions for the second equation are x = 0 and x = 5/4.