Advertisements
Advertisements
प्रश्न
Solve x2 – 4x – 12 =0; when x ∈ I
Advertisements
उत्तर
x2 – 4x – 12 =0
`=> x^2 - 6x + 2x - 12 = 0`
`=> x(x - 6) + 2(x - 6) = 0`
=> (x - 6)(x + 2) = 0
then x = 6 and x = -2
Since `x in I` then x = 6 and -2
संबंधित प्रश्न
The difference of two natural numbers is 5 and the difference of heir reciprocals is `5/14`Find the numbers
Find the values of k for which the roots are real and equal in each of the following equation:
\[kx\left( x - 2\sqrt{5} \right) + 10 = 0\]
Solve the following equation: `("a+b")^2 "x"^2 - 4 "abx" - ("a - b")^2 = 0`
A car covers a distance of 400 km at a certain speed. Had the speed been 12 km/hr more, the time taken for the journey would have been 1 hour 40 minutes less. Find the original speed of the car.
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.
In each of the following determine whether the given values are solutions of the equation or not.
6x2 - x - 2 = 0; x = `-(1)/(2), x = (2)/(3)`
In each of the following, determine whether the given values are solution of the given equation or not:
x2 - 3`sqrt(3)` + 6 = 0; x = `sqrt(3)`, x = -2`sqrt(3)`
Solve the following equation by factorization
`x/(x - 1) + (x - 1)/x = 2(1)/(2)`
Find two consecutive integers such that the sum of their squares is 61
Two squares have sides A cm and (x + 4) cm. The sum of their areas is 656 sq. cm.Express this as an algebraic equation and solve it to find the sides of the squares.
