मराठी

If 1 – i, is a root of the equation x2 + ax + b = 0, where a, b ∈ R, then find the values of a and b. - Mathematics

Advertisements
Advertisements

प्रश्न

If 1 – i, is a root of the equation x2 + ax + b = 0, where a, b ∈ R, then find the values of a and b.

बेरीज

उत्तर

Sum of roots `(-a)/1` = (1 – i) + (1 + i) ⇒ a = –2  ......(Since non real complex roots occur in conjugate pairs)

Product of roots, `b/1` = (1 – i) (1 + i) ⇒ b = 2

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 5: Complex Numbers and Quadratic Equations - Solved Examples [पृष्ठ ८९]

APPEARS IN

एनसीईआरटी एक्झांप्लर Mathematics [English] Class 11
पाठ 5 Complex Numbers and Quadratic Equations
Solved Examples | Q 27 | पृष्ठ ८९

व्हिडिओ ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्‍न

Solve the equation x2 + 3 = 0


Solve the equation  `sqrt2x^2 + x + sqrt2 = 0`


Solve the equation  `sqrt3 x^2 - sqrt2x + 3sqrt3 = 0`


Solve the equation `x^2 + x + 1/sqrt2 = 0`


Solve the equation `3x^2 - 4x + 20/3 = 0`


Solve the equation 21x2 – 28x + 10 = 0


\[4 x^2 + 1 = 0\]


\[x^2 + 2x + 5 = 0\]


\[17 x^2 - 8x + 1 = 0\]


\[13 x^2 + 7x + 1 = 0\]


\[2 x^2 + x + 1 = 0\]


\[\sqrt{3} x^2 - \sqrt{2}x + 3\sqrt{3} = 0\]


\[x^2 - 2x + \frac{3}{2} = 0\]


Solve the following quadratic equation:

\[x^2 + 4ix - 4 = 0\]


Solve the following quadratic equation:

\[i x^2 - x + 12i = 0\]


Solve the following quadratic equation:

\[x^2 - \left( \sqrt{2} + i \right) x + \sqrt{2}i = 0\]


Write the number of real roots of the equation \[(x - 1 )^2 + (x - 2 )^2 + (x - 3 )^2 = 0\].


The complete set of values of k, for which the quadratic equation  \[x^2 - kx + k + 2 = 0\] has equal roots, consists of


If a, b are the roots of the equation \[x^2 + x + 1 = 0, \text { then } a^2 + b^2 =\]


If α, β are the roots of the equation \[x^2 + px + 1 = 0; \gamma, \delta\] the roots of the equation \[x^2 + qx + 1 = 0, \text { then } (\alpha - \gamma)(\alpha + \delta)(\beta - \gamma)(\beta + \delta) =\]


The number of real solutions of \[\left| 2x - x^2 - 3 \right| = 1\] is


The number of solutions of `x^2 + |x - 1| = 1` is ______. 


If one root of the equation \[x^2 + px + 12 = 0\] while the equation \[x^2 + px + q = 0\] has equal roots, the value of q is


The number of roots of the equation \[\frac{(x + 2)(x - 5)}{(x - 3)(x + 6)} = \frac{x - 2}{x + 4}\] is 


If the difference of the roots of \[x^2 - px + q = 0\]  is unity, then

 

Find the value of P such that the difference of the roots of the equation x2 – Px + 8 = 0 is 2.


Find the value of a such that the sum of the squares of the roots of the equation x2 – (a – 2)x – (a + 1) = 0 is least.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×