Question

15хквадрат - 8х-1=0​

Answer 1

Ответ:

x1=1/5; x2=1/3

Пошаговое объяснение:

15x²-8x-1=0

D=b²-4ac=64-60=4=2²

x1=(8-2)/30=1/5

x2=(8+2)/30=1/3

Answer 2

It looks like you have a quadratic equation that you would like to solve. The equation is:

15x² - 8x - 1 = 0

To solve for 'x', you can use the quadratic formula:

x = (-b ± √(b² - 4ac)) / 2a

In your equation, a = 15, b = -8, and c = -1. Plugging these values into the formula:

x = (8 ± √((-8)² - 4 * 15 * (-1))) / (2 * 15)

Simplify:

x = (8 ± √(64 + 60)) / 30 x = (8 ± √124) / 30

Now, calculate the square root of 124:

√124 ≈ 11.1355

So the solutions for 'x' are:

x₁ = (8 + 11.1355) / 30 ≈ 0.6391 x₂ = (8 - 11.1355) / 30 ≈ -0.1105

Therefore, the solutions for the equation 15x² - 8x - 1 = 0 are approximately x₁ ≈ 0.6391 and x₂ ≈ -0.1105.