Question

Значение функции у=2х^2-5х+3 равно -1

Answer 1

2х²-5х+3=-1
2х²-5х+3+1=0
2х²-5х+4=0
D=25-32=-7
Корней нет

Answer 2

To find the value of the function y = 2x^2 - 5x + 3 when y equals -1, we can set the function equal to -1 and then solve for x.

So, we have: 2x^2 - 5x + 3 = -1

Now, let's solve for x:

2x^2 - 5x + 3 + 1 = 0

2x^2 - 5x + 4 = 0

To solve this quadratic equation, we can use factoring or the quadratic formula. Factoring doesn't seem straightforward in this case, so we'll use the quadratic formula:

x = (-b ± √(b^2 - 4ac)) / 2a

where a = 2, b = -5, and c = 4

x = (5 ± √((-5)^2 - 4 * 2 * 4)) / 2 * 2

x = (5 ± √(25 - 32)) / 4

x = (5 ± √(-7)) / 4

Since the square root of a negative number is an imaginary number, there are no real solutions for x in this case, and the function y = 2x^2 - 5x + 3 does not have a value of -1 for any real value of x.