Advertisements
Advertisements
प्रश्न
Solve x2 – 4x – 12 =0; when x ∈ I
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
APPEARS IN
संबंधित प्रश्न
The product of Shikha's age five years ago and her age 8 years later is 30, her age at both times being given in years. Find her present age.
`8x^2-14x-15=0`
Solve for x:
4x2 + 4bx − (a2 − b2) = 0
Factorise : m2 + 5m + 6.
Solve the following quadratic equation by factorization: \[\frac{a}{x - b} + \frac{b}{x - a} = 2\]
Write the number of real roots of the equation x2 + 3 |x| + 2 = 0.
If p and q are the roots of the equation x2 − px + q = 0, then
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.
If the perimeter of a rectangular plot is 68 m and the length of its diagonal is 26 m, find its area.
A shopkeeper buys a certain number of books for Rs 960. If the cost per book was Rs 8 less, the number of books that could be bought for Rs 960 would be 4 more. Taking the original cost of each book to be Rs x, write an equation in x and solve it to find the original cost of each book.
