Advertisements
Advertisements
प्रश्न
Find the zeroes of the polynomial f(x) = `2sqrt3x^2-5x+sqrt3` and verify the relation between its zeroes and coefficients.
Advertisements
उत्तर
`2sqrt3x^2-5x+sqrt3`
`2sqrt3x^2-2x-3x+sqrt3`
`2x(sqrt3x-1) or (2x-sqrt3=)=0`
`(sqrt3x-1)=0 or (2x-sqrt3)=0`
`x=1/sqrt3 or x=sqrt3/2`
`x=1/sqrt3xxsqrt3/sqrt3=sqrt3/3 or x=sqrt3/2`
Sum of zeroes= `sqrt3/3+sqrt2=(5sqrt3)/6 = -(("coefficient of" x))/(("coefficient of" x^2))`
Product of zeroes=`sqrt3/3xxsqrt3/2=sqrt3/6= ("constant term")/(("coefficient of "x^2))`
APPEARS IN
संबंधित प्रश्न
Find a quadratic polynomial with the given numbers as the sum and product of its zeroes respectively.
`0, sqrt5`
If α and β are the zeros of the quadratic polynomial f(x) = 6x2 + x − 2, find the value of `alpha/beta+beta/alpha`.
If α and β are the zeros of the quadratic polynomial f(x) = x2 − px + q, prove that `alpha^2/beta^2+beta^2/alpha^2=p^4/q^2-(4p^2)/q+2`
If If α and β are the zeros of the quadratic polynomial f(x) = x2 – 2x + 3, find a polynomial whose roots are α + 2, β + 2.
If the zeros of the polynomial f(x) = ax3 + 3bx2 + 3cx + d are in A.P., prove that 2b3 − 3abc + a2d = 0.
Find the zeroes of the quadratic polynomial `4x^2 - 4x + 1` and verify the relation between the zeroes and the coefficients.
Find the quadratic polynomial, sum of whose zeroes is `sqrt2` and their product is `(1/3)`.
Find a cubic polynomial whose zeroes are 2, -3and 4.
By actual division, show that x2 – 3 is a factor of` 2x^4 + 3x^3 – 2x^2 – 9x – 12.`
Find all the zeroes of `(x^4 + x^3 – 23x^2 – 3x + 60)`, if it is given that two of its zeroes are `sqrt3 and –sqrt3`.
Define a polynomial with real coefficients.
If two zeros x3 + x2 − 5x − 5 are \[\sqrt{5}\ \text{and} - \sqrt{5}\], then its third zero is
If two zeroes of the polynomial x3 + x2 − 9x − 9 are 3 and −3, then its third zero is
If x + 2 is a factor of x2 + ax + 2b and a + b = 4, then
Case Study -1

The figure given alongside shows the path of a diver, when she takes a jump from the diving board. Clearly it is a parabola.
Annie was standing on a diving board, 48 feet above the water level. She took a dive into the pool. Her height (in feet) above the water level at any time ‘t’ in seconds is given by the polynomial h(t) such that h(t) = -16t2 + 8t + k.
The zeroes of the polynomial r(t) = -12t2 + (k - 3)t + 48 are negative of each other. Then k is ______.
For the following, find a quadratic polynomial whose sum and product respectively of the zeroes are as given. Also find the zeroes of these polynomials by factorisation.
`-2sqrt(3), -9`
If one zero of the polynomial p(x) = 6x2 + 37x – (k – 2) is reciprocal of the other, then find the value of k.
A quadratic polynomial whose sum and product of zeroes are 2 and – 1 respectively is ______.
Find the zeroes of the polynomial x2 + 4x – 12.
The zeroes of the polynomial p(x) = 25x2 – 49 are ______.
