Home
Class 12
MATHS
If 2+sqrt(3)i is a root of the equation ...

If `2+sqrt(3)i` is a root of the equation `x^2+p x+1=0` , then write the values of `p\ a n d\ q` .

Text Solution

Verified by Experts

Accordingly ` 2 + isqrt3` is a root of the equation ` x^(2) + px + q =0` ,then other root must be ` 2 -isqrt3` now sum of roots =` -p = ( 2 + sqrt3) + ( 2- isqrt3)= 4`
` Rightarrow p =-4`
Product of roots ` = q = ( 2 + isqrt3) (2 -isqrt3) , ( 2+ isqrt3) ( 2 -isqrt3) = 4 -3i^(2)=7`
Promotional Banner

Topper's Solved these Questions

  • COMPLEX NUMBERS AND QUADRATIC EQUATIONS

    AAKASH INSTITUTE ENGLISH|Exercise Try Yourself|60 Videos
  • COMPLEX NUMBERS AND QUADRATIC EQUATIONS

    AAKASH INSTITUTE ENGLISH|Exercise Assignment (Section -A) (objective Type Questions ( one option is correct)|47 Videos
  • BINOMIAL THEOREM

    AAKASH INSTITUTE ENGLISH|Exercise Assignment (section-J) Objective type question (Aakash Challengers Questions)|4 Videos
  • CONIC SECTIONS

    AAKASH INSTITUTE ENGLISH|Exercise SECTION - J ( Aakash Challengers Questions )|16 Videos

Similar Questions

Explore conceptually related problems

If 2+sqrt(3)i is a root of the equation x^2+p x+q=0 , then write the values of p\ a n d\ q .

If a\ a n d\ b are roots of the equation x^2-x+1=0 then write the value of a^2+b^2dot

If a\ a n d\ b are roots of the equation x^2-p x+q=0 ,then write the value of 1/a+1/bdot

If the sum of square of roots of the equation x^2+(p+i q)x+3i=0 is 8, then find the value of p and q , where p and q are real.

If 3+4i is a root of equation x^(2)+px+q=0 where p, q in R then

If (1-p) is a root of quadratic equation x^2+p x+(1-p)=0, then find its roots.

If (1-p) is a root of quadratic equation x^2+p x+(1-p)=0, then find its roots.

If -3+5i is a root of the equation x^2+p x+q=0 , then the ordered pair (p ,q) is (p ,q in R) (-6,34) (b) (6,34) 34 ,-6) (d) 34 ,6)

If p and q are roots of the quadratic equation x^(2) + mx + m^(2) + a = 0 , then the value of p^(2) + q^(2) + pq , is

If the roots of the equation x^2 + px-q = 0 are tan 30^@ and tan 15^@ then the value of 2-q-p is