हिंदी

Compare the quadratic equation x2+93x+24=0 to ax2 + bx + c = 0 and find the value of discriminant and hence write the nature of the roots. - Algebra

Advertisements
Advertisements

प्रश्न

Compare the quadratic equation `x^2 + 9sqrt(3)x + 24 = 0` to ax2 + bx + c = 0 and find the value of discriminant and hence write the nature of the roots.

योग
Advertisements

उत्तर

Given equation is, `x^2 + 9sqrt(3)x + 24 = 0`

Comparing the given equation with ax2 + bx + c = 0, we get

a = 1, b = `9sqrt(3)`, c = 24

Discriminant, D = b2 – 4ac

= `(9sqrt(3))^2 - 4(1)(24)`

= 243 – 96

= 147

Here, D > 0.

As a result, the roots of the quadratic equation are both real and unequal.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
2025-2026 (March) Model set 4 by shaalaa.com

संबंधित प्रश्न

Find the values of k for which the quadratic equation (k + 4) x2 + (k + 1) x + 1 = 0 has equal roots. Also find these roots.


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

(x - 2a)(x - 2b) = 4ab


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

(4 - k)x2 + (2k + 4)x + 8k + 1 = 0


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

x2 - 4kx + k = 0


For what value of k,  (4 - k)x2 + (2k + 4)x + (8k + 1) = 0, is a perfect square.


If a, b, c are real numbers such that ac ≠ 0, then show that at least one of the equations ax2 + bx + c = 0 and -ax2 + bx + c = 0 has real roots.


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

10 x - `1/x` = 3


Solve the following quadratic equation using formula method only 

`3"x"^2 +2 sqrt 5 "x" -5 = 0`


Solve the following quadratic equation using formula method only 

3x2 + 12 = 32 x


Find the value of m for which the equation (m + 4)x2 + (m + 1)x + 1 = 0 has real and equal roots.


Find the value of k for which the following equation has equal roots:
(k − 12)x2 + 2(k − 12)x + 2 = 0.


Form the quadratic equation whose roots are:
`sqrt(3) and 3sqrt(3)`


Find the nature of the roots of the following quadratic equations: `x^2 - 2sqrt(3)x - 1` = 0 If real roots exist, find them.


Which of the following equations has 2 as a root?


If b2 – 4ac > 0 and b2 – 4ac < 0, then write the nature of roots of the quadratic equation for each given case


The value of k for which the equation x2 + 2(k + 1)x + k2 = 0 has equal roots is:


Find the sum of the roots of the equation x2 –  8x + 2 = 0


(x2 + 1)2 – x2 = 0 has ______.


Complete the following activity to determine the nature of the roots of the quadratic equation x2 + 2x – 9 = 0 :

Solution :

Compare x2 + 2x – 9 = 0 with ax2 + bx + c = 0

a = 1, b = 2, c = `square`

∴ b2 – 4ac = (2)2 – 4 × `square` × `square`

Δ = 4 + `square` = 40

∴ b2 – 4ac > 0

∴ The roots of the equation are real and unequal.


If 3 is a root of the quadratic equation x2 – px + 3 = 0 then p is equal to ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×