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    Which of the following quadratic equations satisfies that the roots are 3 and -2 ?
    Question

    Which of the following quadratic equations satisfies that the roots are 3 and -2 ?

    A.

    x2x+6=0x^2-x+6=0​​

    B.

    x2+x6=0x^2+x-6=0​​

    C.

    x2x6=0x^2-x-6=0​​

    D.

    x2+x+6=0x^2+x+6=0​​

    Correct option is C

    Given:

    The roots are 3 and -2 

    Formula used: 


    ax2+bx+c=0ax^2 + bx + c = 0 

    Sum of rootsα+β α+β = -ba\frac{b}{a} 

    Product of roots = αβα⋅β = ca\frac{c}{a}  

    Solution:

    α\alpha = 3 

     ββ = -2

    Sum of roots = 3 + (-2) = 1
    ​Product of roots  = 3×(2)=63 \times (-2) = -6

    Now, 

    (xα)(xβ)=0(x−α)(x−β)=0 

    (x3)(x+2)=0(x−3)(x+2)=0 

    (x2+2x3x6)=0(x ^2 +2x−3x−6)=0​ 

    (x2x6)=0(x ^2 −x−6)=0 ,   ​

    x2x6=0x ^2 −x−6=0 

    ​​


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