Advertisements
Advertisements
प्रश्न
Find the value of discriminant.
2y2 – 5y + 10 = 0
उत्तर
2y2 – 5y + 10 = 0 Comparing the given equation with ax2 + bx + c = 0
a = 2, b = -5 and c = 10
So, the discriminant b2 - 4ac = (-5)2 - 4 × 2 × 10
= 25 - 80
= -55
APPEARS IN
संबंधित प्रश्न
Find the roots of the following quadratic equations, if they exist, by the method of completing the square 2x2 + x + 4 = 0
Find the roots of the following equations:
`x-1/x = 3, x ≠ 0`
Sum of the areas of two squares is 468 m2. If the difference of their perimeters is 24 m, find the sides of the two squares.
Find the roots of the following quadratic equations (if they exist) by the method of completing the square.
`x^2-4sqrt2x+6=0`
`2/x^2-5/x+2=0`
`4x^2+4bx-(a^2-b^2)=0`
The length of a rectangle is thrice as long as the side of a square. The side of the square is 4 cm more than the width of the rectangle. Their areas being equal, find the dimensions.
Sum of the areas of two squares is 400 cm2. If the difference of their perimeters is 16 cm, find the sides of the two squares ?
Solve the following quadratic equation by completing the square method.
x2 + x – 20 = 0
Solve the following quadratic equation by completing the square method.
5x2 = 4x + 7
Fill in the gap and complete.
The sum of the squares of two consecutive odd numbers is 394. Find the numbers.
Sum of the area of two squares is 400 cm2. If the difference of their perimeters is 16 cm, find the sides of two squares.
Write the value of λ for which x2 + 4x + λ is a perfect square.
If p2x2 – q2 = 0, then x =?
The positive root of `sqrt(3"x"^2 + 6)` = 9 is:
If Ritu were younger by 5 years than what she really is, then the square of her age would have been 11 more than five times her present age. What is her present age?
Find the remainder when p(x) = 3x2 + 2x – 7 is divided by 2x + 1.
The ratio of two numbers is 3:2 and the difference of their square is 500. Find the numbers.
