Question

find the disctiminant of quadratic equation 3x^2-x-2=0​

Answer 1

Step-by-step explanation:

The value of discriminant of x^2 - 3x + 2

= 0 is D = b^2 - 4ac a = 1, b = - 3, c = 2 D = ( - 3)^2 - 4 × 1 × 2 = 9 - 8 = 1

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Answer 2

Given,

The discriminant of 3x

2

+2x+a=0 is double the discriminant of x

2

−4x+2=0

We know that the discriminant of a quadratic equation ax

2

+bx+c=0 is given by: b

2

−4ac

Hence,

(2)

2

−4×3×a=2×((−4)

2

−4×1×2)

4−12a=2×(16−8)

4−12a=16

12a=4−16

12a=−12

a=−1