Question

8) - 2 x ² + x +15=0 7​

Answer 1

Объяснение:

если вы не учили корень, то не знаю как это решить

Answer 2

To solve the quadratic equation -2x² + x + 15 = 0, we can use the quadratic formula:

x = (-b ± √(b² - 4ac)) / (2a)

In this equation, a = -2, b = 1, and c = 15. Plugging these values into the quadratic formula, we get:

x = (-(1) ± √((1)² - 4(-2)(15))) / (2(-2)) x = (-1 ± √(1 + 120)) / (-4) x = (-1 ± √121) / (-4)

Simplifying further:

x = (-1 ± 11) / (-4)

We have two possible solutions:

1. When x = (-1 + 11) / (-4): x = 10 / (-4) x = -2.5

2. When x = (-1 - 11) / (-4): x = -12 / (-4) x = 3

Therefore, the solutions to the equation -2x² + x + 15 = 0 are x = -2.5 and x = 3.