NDA2022MathematicsQuadratic EquationActual
Let and be the roots of the equation x^2-a x-b x+a b-c=0 . What is the quadratic equation whose roots are a and b ?
Options
- Ax^2- x- x+ +c=0
- Bx^2- x- x+ -c=0
- Cx^2+ x+ x+ +c=0
- Dx^2+ x+ x+ -c=0
Correct answer
A. x^2- x- x+ +c=0
Step-by-step solution
Given that and are roots of the equation array cl & x^2-a x-b x+a b-c=0 i.e & x^2-(a+b) x+a b-c=0 & + =a+b . =a b-c & a b= +c array The quadratic equation whose roots are a and b is aligned & x^2-(a+b) x+a b=0 & x^2-( + ) x+ +c=0 & x^2- x- x+ +c=0 aligned