MEDIUM
Earn 100

If the roots of 4x2+5k=(5k+1)x differ by unity, then find the values of k.

Important Questions on Quadratic Equations

MEDIUM
The product of Reena's age (in years) 5 years ago and her age 8 years later is 30. Find her present age in number of years.
HARD
A train travels at a certain average speed for a distance of 63 km and then travels at a distance of 72 km at an average speed of 6 km/hr more than its original speed. If it takes 3 hours to complete total journey, what is the original average speed (km/hr?
EASY
Under what condition will ax2+5x+7=0 be a quadratic equation?
EASY

Two equations are given, you should solve both the equations and get the answer:

i X2-11X+24=0

ii Y2+14Y-45+0

MEDIUM
Find the zeros of the quadratic polynomial x2+7x+10 and verify the relationship between the zeros and the coefficient.
HARD
Divide 16 into two parts such that twice the square of larger part exceeds the square of the smaller part by 164
EASY

Two equations are given, you have to solve both the equations and get the answer:

i 2X2-4X+2=0

ii 2Y2-Y-1=0

EASY

Two equations are given, you have to solve both the equations and should get the answer:

i X2-15X+56=0

ii Y=64

MEDIUM
The difference of squares of two natural numbers is 180.  The square of the smaller number is 8 times the larger number. Find the two numbers.
MEDIUM
If roots of binomial equation 6x2-5x+1=0 are a and β find the sum of their squares.
EASY

State whether the given equation is quadratic or not. Give reason. 

54m2-7=0

HARD

The difference of the squares of two positive numbers is 45. The square of the smaller number is four times the larger number. Find the numbers.

EASY

Find the sum and the products of the roots of:

3x2-5x+2=0

EASY
If one of the roots of the quadratic equation x2-7x+k=0 is 4, then find the value of k.
EASY
Solve the quadratic equation 9x2-3x-2=0
EASY

Two equations are given, you have to solve both the equations and get the answer:

i X2-X-6=0

ii Y2-6Y+8=0

MEDIUM

The factors of equation x2+7x+12=0  are-

(A) -3 and -4 

(B) 3 and -4 

(C) -3 and 4 

(D) 3 and 4 

EASY

FInd the factors of (x2 - x - 132):

1. (x - 11) (x -12)
2. (x  + 12) (x -11)
3. (x + 11) (x + 12)
4. (x - 12) (x + 11)