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Alexeev081 [22]
3 years ago
14

what is the value of the discriminant, b2 − 4ac, for the quadratic equation 0 = −2x2 − 3x 8, and what does it mean about the num

ber of real solutions the equation has? the discriminant is −55, so the equation has 2 real solutions. the discriminant is −55, so the equation has no real solutions. the discriminant is 73, so the equation has 2 real solutions. the discriminant is 73, so the equation has no real solutions.
Mathematics
2 answers:
Naily [24]3 years ago
5 0
Rewrite the equation:

-2x^2 - 3x + 8 = 0

2x^2 + 3x -8 =0

Where a=2, b=3 and c=-8

Then b^2 - 4ac = 3^2 - 4(2)(-8) = 9 + 64 = 73

A positive discriminant implies that the equation has two different real solutions.

Answer:  the discriminant is 73, so the equation has 2 real solution
Alexeev081 [22]3 years ago
3 0

Answer:

The correct option 3.

Step-by-step explanation:

The given equation is

-2x^2-3x+8=0

The discriminant formula is

D=b^2-4ac

The value of discriminant for the given quadratic equation is

D=(-3)^2-4(-2)(8)

D=9+64

D=73

Therefore the value of the discriminant is 73.

The number of real solution depends on the value of discriminant.

1. If D=0, then the quadratic equation has one real solution.

2. If D>0, then the quadratic equation has two real solutions.

3. If D<0, then the quadratic equation has not real solutions.

Since the value of discriminant is greater than 0, therefore the equation has two real solutions.

Option 3 is correct.

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