Advertisements
Advertisements
प्रश्न
Solve the following equation: 25x (x + 1) = -4
Advertisements
उत्तर
25x (x + 1) = -4
`"x"^2 + "x" = -4/25`
`"x"^2 + "x" + 4/25 = 0`
`"x"^2 + 1/5 "x" + 4/5 "x" + 4/25 = 0`
`"x" ("x" + 1/5) + 4/5 ("x" + 4/25) =0`
`("x" + 1/5)("x" + 4/5) = 0`
`("x" + 1/5) = 0` , `("x" + 4/5) = 0`
x = `-1/5` , x = `-4/5`
APPEARS IN
संबंधित प्रश्न
In a class test, the sum of Shefali’s marks in Mathematics and English is 30. Had she got 2 marks more in Mathematics and 3 marks less in English, the product of their marks would have been 210. Find her marks in the two subjects.
Find the values of p for which the quadratic equation \[\left( 2p + 1 \right) x^2 - \left( 7p + 2 \right)x + \left( 7p - 3 \right) = 0\] has equal roots. Also, find these roots.
Solve the following equation: abx2 +(b2-ac) x - bc = 0
A two digit number is four times the sum and 3 times the product of its digits, find the number.
The present age of the mother is square of her daughter's present age. 4 years hence, she will be 4 times as old as her daughter. Find their present ages.
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.
Two pipes running together can 1 fill a cistern in 11 1/9 minutes. If one pipe takes 5 minutes more than the other to fill the cistern find the time when each pipe would fill the cistern.
Solve the following equation by factorization
2x2 – 9x + 10 = 0,when x∈N
Solve the following equation by factorization
`a/(ax - 1) + b/(bx - 1) = a + b, a + b ≠ 0, ab ≠ 0`
Five times a certain whole number is equal to three less than twice the square of the number. Find the number.
