Advertisements
Advertisements
प्रश्न
Find the values of x if p + 1 =0 and x2 + px – 6 = 0
Advertisements
उत्तर
p + 1 = 0, then p = – 1
Substituting the value of p in the given quadratic equation
x2 + ( – 1)x – 6 = 0
⇒ x2 – x – 6 = 0
⇒ x2 – 3x + 2x – 6 = 0
⇒ x(x – 3) + 2(x – 3) = 0
⇒ (x – 3) (x + 2) = 0
Either x – 3 = 0,
then x = 3
or
x + 2 = 0,
then x = – 2
Hence x = 3, -2.
APPEARS IN
संबंधित प्रश्न
An aeroplane left 50 minutes later than its scheduled time, and in order to reach the destination, 1250 km away, in time, it had to increase its speed by 250 km/hr from its usual speed. Find its usual speed.
If the sum and product of the roots of the equation kx2 + 6x + 4k = 0 are real, then k =
Solve the following equation: 3x2 + 25 x + 42 = 0
Solve the following equation:
`(x - 1)/(2x + 1) + (2x + 1)/(x - 1) = 5/2 , x ≠-1/2`
Solve the following equation : x2 + 2ab = (2a + b)x
Solve the following equation by factorization
21x2 – 8x – 4 = 0
Solve the following equation by factorization
2x2 – 9x + 10 = 0,when x∈Q
The difference between the squares of two numbers is 45. The square of the smaller number is 4 times the larger number. Determine the numbers.
Solve the following equation by factorisation :
x2 + 6x – 16 = 0
Solve the following quadratic equation by factorisation method:
x2 + x – 20 = 0
