Question

Решите уравнение -2x^2+7x-9

Answer 1

Смотри..........,...........

Answer 2

To solve the quadratic equation -2x^2 + 7x - 9 = 0, we can use the quadratic formula:

The quadratic formula states that for an equation of the form ax^2 + bx + c = 0, the solutions for x are given by:

x = (-b ± √(b^2 - 4ac)) / 2a

In our case, a = -2, b = 7, and c = -9. Plugging these values into the formula, we get:

x = (-(7) ± √(7^2 - 4(-2)(-9))) / 2(-2)

x = (-7 ± √(49 - 72)) / -4

x = (-7 ± √(-23)) / -4

Since the discriminant (b^2 - 4ac) is negative (-23), the solutions will involve complex numbers. Let's simplify it further:

x = (-7 ± √23i) / -4

So the two solutions for x are:

1. x = (-7 + √23i) / -4
2. x = (-7 - √23i) / -4

These are the complex roots of the given quadratic equation.