Math, asked by surajguptasuraj70, 9 months ago

If a,ß are the zeroes of the polynomial x2 – 3x +5 then
alpha/beta+beta/alpha
=?

Answers

Answered by MaheswariS
1

\underline{\textbf{Given:}}

\mathsf{\alpha\;and\;\beta\;are\;zeroes\;of\;x^2-3x+5}

\underline{\textbf{To find:}}

\textsf{The value of}

\mathsf{\dfrac{\alpha}{\beta}+\dfrac{\beta}{\alpha}}

\underline{\textbf{Solution:}}

\mathsf{Consider,\;x^2-3x+5}

\mathsf{Sum\;of\;zeroes=\dfrac{-b}{a}}

\implies\mathsf{\alpha+\beta=3}

\mathsf{Product\;of\;zeroes=\dfrac{c}{a}}

\implies\mathsf{\alpha\,\beta=5}

\mathsf{Now,}

\mathsf{\dfrac{\alpha}{\beta}+\dfrac{\beta}{\alpha}}

\mathsf{=\dfrac{{\alpha}^2+{\beta}^2}{\alpha\,\beta}}

\mathsf{=\dfrac{({\alpha}+{\beta})^2-2\,\alpha\,\beta}{\alpha\,\beta}}

\mathsf{=\dfrac{(3)^2-2(5)}{5}}

\mathsf{=\dfrac{9-10}{5}}

\mathsf{=\dfrac{-1}{5}}

\implies\boxed{\mathsf{\dfrac{\alpha}{\beta}+\dfrac{\beta}{\alpha}=\dfrac{-1}{5}}}

\underline{\textbf{Find more:}}

Solve: ( x− 4)( x+ 4) = ( x+ 3)( x− 7) + 35​

https://brainly.in/question/36246901  

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