Advertisements
Advertisements
प्रश्न
Is 0.2 a root of the equation x2 – 0.4 = 0? Justify
उत्तर
No, since 0.2 does not satisfy the quadratic equation
i.e., (0.2)2 – 0.4 = 0.04 – 0.4 ≠ 0
APPEARS IN
संबंधित प्रश्न
Solve the following quadratic equations by factorization:
`1/x-1/(x-2)=3` , x ≠ 0, 2
Two squares have sides x cm and (x + 4) cm. The sum of this areas is 656 cm2. Find the sides of the squares.
A fast train takes one hour less than a slow train for a journey of 200 km. If the speed of the slow train is 10 km/hr less than that of the fast train, find the speed of the two trains.
Two pipes running together can fill a tank in `11 1/9` minutes. If one pipe takes 5 minutes more than the other to fill the tank separately, find the time in which each pipe would fill the tank separately.
The sum of the squares of two consecutive multiples of 7 is 637. Find the multiples ?
Find the value of k for which the following equations have real and equal roots:
\[x^2 + k\left( 2x + k - 1 \right) + 2 = 0\]
Solve equation using factorisation method:
x2 – (a + b)x + ab = 0
In each of the following, determine whether the given values are solution of the given equation or not:
`x = 1/x = (13)/(6), x = (5)/(6), x = (4)/(3)`
Solve the following equation by factorization
`x^2 - (1 + sqrt(2))x + sqrt(2)` = 0
An aeroplane flying with a wind of 30 km/hr takes 40 minutes less to fly 3600 km, than what it would have taken to fly against the same wind. Find the planes speed of flying in still air.