Advertisements
Advertisements
प्रश्न
If the discriminant of the quadratic equation 3x2 - 2x + c = 0 is 16, then the value of c is ______.
विकल्प
1
0
-1
`sqrt2`
Advertisements
उत्तर
If the discriminant of the quadratic equation 3x2 - 2x + c = 0 is 16, then the value of c is -1.
Explanation:
The quadratic equation 3x2 - 2x + c = 0 has a discriminant of 16, we can set up the equation for the discriminant:
D = (-2)2 - 4(3)c = 16
4 - 12c = 16
-12c = 12
c = -1
APPEARS IN
संबंधित प्रश्न
Solve the equation:`14/(x+3)-1=5/(x+1); xne-3,-1` , for x
Solve the following quadratic equation by factorization:
`(x-5)(x-6)=25/(24)^2`
The time taken by a person to cover 150 km was 2.5 hrs more than the time taken in the return journey. If he returned at a speed of 10 km/hr more than the speed of going, what was the speed per hour in each direction?
The sum of the squares of two consecutive multiples of 7 is 637. Find the multiples ?
One fourth of a herd of camels was seen in the forest. Twice the square root of the herd had gone to mountains and the remaining 15 camels were seen on the bank of a river. Find the total number of camels.
Solve the following by reducing them to quadratic equations:
`((7y - 1)/y)^2 - 3 ((7y - 1)/y) - 18 = 0, y ≠ 0`
Solve the following by reducing them to quadratic equations:
`sqrt(x/(1 -x)) + sqrt((1 - x)/x) = (13)/(6)`.
In each of the following determine whether the given values are solutions of the equation or not.
9x2 - 3x - 2 = 0; x = `-(1)/(3), x = (2)/(3)`
A wire ; 112 cm long is bent to form a right angled triangle. If the hypotenuse is 50 cm long, find the area of the triangle.
Car A travels ‘x’ km for every litre of petrol, while car B travels (x + 5) km for every litre of petrol.
- Write down the number of litres of petrol used by car A and car B in covering a distance of 400 km.
- If car A uses 4 litres of petrol more than car B in covering 400 km. write down an equation, in A and solve it to determine the number of litres of petrol used by car B for the journey.
