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For the following, find the discriminant, [tex]b^2 - 4ac[/tex], and then determine whether there is one real-number solution, two different real-number solutions, or two different imaginary-number solutions.

[tex]
3t^2 - 5t = 0
[/tex]


Sagot :

To solve the given quadratic equation [tex]\(3t^2 - 5t = 0\)[/tex], we need to find the discriminant and determine the nature of the solutions. Here's how we can do that step-by-step:

1. Identify the coefficients:
The given quadratic equation is in the form [tex]\(at^2 + bt + c = 0\)[/tex]. Here:
- [tex]\(a = 3\)[/tex]
- [tex]\(b = -5\)[/tex]
- [tex]\(c = 0\)[/tex]

2. Calculate the discriminant:
The discriminant ([tex]\(\Delta\)[/tex]) of a quadratic equation [tex]\(at^2 + bt + c = 0\)[/tex] is given by the formula:
[tex]\[ \Delta = b^2 - 4ac \][/tex]
In our case, we substitute [tex]\(a = 3\)[/tex], [tex]\(b = -5\)[/tex], and [tex]\(c = 0\)[/tex]:
[tex]\[ \Delta = (-5)^2 - 4 \cdot 3 \cdot 0 \][/tex]
[tex]\[ \Delta = 25 - 0 \][/tex]
[tex]\[ \Delta = 25 \][/tex]

3. Determine the nature of the solutions:
The nature of the solutions depends on the value of the discriminant:
- If [tex]\(\Delta > 0\)[/tex], there are two different real-number solutions.
- If [tex]\(\Delta = 0\)[/tex], there is one real-number solution.
- If [tex]\(\Delta < 0\)[/tex], there are two different imaginary number solutions.

Since [tex]\(\Delta = 25\)[/tex] and [tex]\(25 > 0\)[/tex], the quadratic equation [tex]\(3t^2 - 5t = 0\)[/tex] has two different real-number solutions.

So, the discriminant of [tex]\(3t^2 - 5t = 0\)[/tex] is [tex]\(25\)[/tex], and the equation has two different real-number solutions.