Math, asked by shareensuru71333, 4 months ago

If α and β are two zeros of the polynomial 2x²+7x+5 then α+β+2αβ​

Answers

Answered by ajay8949
0

Let α and ß are the zeroes of the quadratic polynomial.

 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \sf{2 {x}^{2}  + 7x + 5 = 0}

 \:  \:  \:  \:  \:  \:  \:  \:  \sf{2 {x}^{2}  + 5x + 2x + 5 = 0}

  \:  \:  \:  \:  \: \sf{x(2x + 5) + 1(2x + 5) = 0}

  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: \sf{(x + 1)(2x + 5) = 0}

 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \sf{x =  - 1 \: and \: -   \frac{  5}{2}}

  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \sf{\alpha  +  \beta  + 2 \alpha  \beta }

⟹  \:  \: -  1+ (  - \frac{ 5}{2} ) + ( - 1)(  - \frac{5}{2} )

⟹  \:  \:  \: \:  \:  \:  \:  \:  \:  -  {1} \cancel{ -  \frac{5}{2 } }  +   \cancel{\frac{5}{2}  }\\

⟹ \:  \:  \:  \:  \:   \:  \:  \:  \:  \:  \:  \:  \:  \: \:  \:  \:  \:  - 1

 \sf\orange{please\:mark\:as\:brainliest............}

Answered by SP85
0

Formula of mode

3median-2median

Similar questions