हिंदी

Solve the Following Quadratic Equations by Factorization: `X^2+(A+1/A)X+1=0`

Advertisements
Advertisements

प्रश्न

Solve the following quadratic equations by factorization:

`x^2+(a+1/a)x+1=0`

Advertisements

उत्तर

We have been given

`x^2+(a+1/a)x+1=0`

`x^2+ax+1/ax+1=0`

`x(x+a)+1/a(x+a)=0`

`(x+1/a)(x+a)=0`

Therefore,

`x+1/a=0`

`x=-1/a`

or,

x + a = 0

x = -a

Hence, `x=-1/a` or x = -a

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 4: Quadratic Equations - Exercise 4.3 [पृष्ठ २१]

APPEARS IN

आर.डी. शर्मा Mathematics [English] Class 10
अध्याय 4 Quadratic Equations
Exercise 4.3 | Q 54 | पृष्ठ २१

संबंधित प्रश्न

Solve the following quadratic equations

(i) 7x2 = 8 – 10x

(ii) 3(x2 – 4) = 5x

(iii) x(x + 1) + (x + 2) (x + 3) = 42


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


Solve for x :

`1/(x + 1) + 3/(5x + 1) = 5/(x + 4), x != -1, -1/5, -4`


A two-digit number is such that the products of its digits is 8. When 18 is subtracted from the number, the digits interchange their places. Find the number?


In a class test, the sum of the marks obtained by P in Mathematics and science is 28. Had he got 3 marks more in mathematics and 4 marks less in Science. The product of his marks would have been 180. Find his marks in two subjects.


Solve  2x2 – 9x + 10 =0; when x ∈ Q


Solve:

`1/(x + 1) - 2/(x + 2) = 3/(x + 3) - 4/(x + 4)`


Solve the following quadratic equations by factorization: 

`100/x-100/(x+5)=1` 

 


Determine whether the values given against the quadratic equation are the roots of the equation.

x2 + 4x – 5 = 0 , x = 1, –1


Solve the following quadratic equations by factorization: \[2 x^2 + ax - a^2 = 0\]


Solve the following quadratic equations by factorization: \[\frac{5 + x}{5 - x} - \frac{5 - x}{5 + x} = 3\frac{3}{4}; x \neq 5, - 5\]


Write the set of value of 'a' for which the equation x2 + ax − 1 = 0 has real roots.


Solve the following equation: (x-8)(x+6) = 0


A two digit number is such that its product of its digit is 18. When 63 is subtracted from the number, the digits interchange their places. Find the number.


The perimeter of the right angled triangle is 60cm. Its hypotenuse is 25cm. Find the area of the triangle. 


Solve the equation 2x `-(1)/x` = 7. Write your answer correct to two decimal places.


In each of the following determine whether the given values are solutions of the equation or not.
x2 + x + 1 = 0; x = 1, x = -1.


Paul is x years old and his father’s age is twice the square of Paul’s age. Ten years hence, the father’s age will be four times Paul’s age. Find their present ages.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×