मराठी

A quadratic equation with integral coefficient has integral roots. Justify your answer. - Mathematics

Advertisements
Advertisements

प्रश्न

A quadratic equation with integral coefficient has integral roots. Justify your answer.

बेरीज
Advertisements

उत्तर

No, a quadratic equation with integral coefficients may or may not have integral roots.

Justification:

Consider the following equation,

8x2 – 2x – 1 = 0

The roots of the given equation are `1/2` and `-1/4` which are not integers.

Hence, a quadratic equation with integral coefficient might or might not have integral roots.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 4: Quadatric Euation - Exercise 4.2 [पृष्ठ ३९]

APPEARS IN

एनसीईआरटी एक्झांप्लर Mathematics [English] Class 10
पाठ 4 Quadatric Euation
Exercise 4.2 | Q 3 | पृष्ठ ३९

संबंधित प्रश्‍न

Find the values of k for which the roots are real and equal in each of the following equation:

(k + 1)x2 + 2(k + 3)x + (k + 8) = 0


Find the values of k for which the roots are real and equal in each of the following equation:

5x2 - 4x + 2 + k(4x2 - 2x - 1) = 0


If x = −2 is a root of the equation 3x2 + 7x + p = 1, find the values of p. Now find the value of k so that the roots of the equation x2 + k(4x + k − 1) + p = 0 are equal.


Find the roots of the equation  .`1/(2x-3)+1/(x+5)=1,x≠3/2,5`


Find the value of the discriminant in the following quadratic equation :

10 x - `1/x` = 3


Find the value of the discriminant in the following quadratic equation: 

x2 +2x-2=0 


Determine the nature of the roots of the following quadratic equation : 

2x2 + x-1=0 


Find, using the quadratic formula, the roots of the following quadratic equations, if they exist

x2 + 4x + 5 = 0


Find the value of k for which the given equation has real roots:
9x2 + 3kx + 4 = 0.


Solve the following by reducing them to quadratic equations:
x4 - 26x2 + 25 = 0


Given that one root of the quadratic equation ax2 + bx + c = 0 is three times the other, show that 3b2 – 16ac.


Find the discriminant of the following equations and hence find the nature of roots: 2x2 + 15x + 30 = 0


Find the value (s) of k for which each of the following quadratic equation has equal roots : (k – 4) x2 + 2(k – 4) x + 4 = 0


Choose the correct alternative answer for the following sub questions and write the correct alphabet.

What is the value of discriminant for the quadratic equation X2 – 2X – 3 = 0?


State whether the following quadratic equation have two distinct real roots. Justify your answer.

`2x^2 - 6x + 9/2 = 0`


If the coefficient of x2 and the constant term of a quadratic equation have opposite signs, then the quadratic equation has real roots.


Find the roots of the quadratic equation by using the quadratic formula in the following:

`1/2x^2 - sqrt(11)x + 1 = 0`


Find the value of 'k' so that the quadratic equation 3x2 – 5x – 2k = 0 has real and equal roots.


The sum of all integral values of k(k ≠ 0) for which the equation `2/(x - 1), 1/(x - 2) = 2/k` in x has no real roots, is ______.


Find the value of k for which the roots of the quadratic equation 5x2 – 10x + k = 0 are real and equal.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×