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sooyong94
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Homework Statement
Homework Equations
Quadratic discriminant
The Attempt at a Solution
I did b^2 -4ac>=0, but the algebra becomes prohibitively difficult.
sooyong94 said:Homework Statement
Homework Equations
Quadratic discriminant
The Attempt at a Solution
I did b^2 -4ac>=0, but the algebra becomes prohibitively difficult.
sooyong94 said:I got something like
ab-4ac-ad+bc+bd-cd but I can't seem to work around that.
Thanks - I guess there's a misprint in my book after all.Irene Kaminkowa said:In the second equation there is a misprint
The correct equation is
(a+c-b)x2-2(a-c)x+(a+c+b) = 0
The proof is not difficult. Just find the discriminant.
The quadratic discriminant formula is given by Δ = b² - 4ac, where a, b, and c are the coefficients in a quadratic equation of the form ax² + bx + c = 0.
If Δ > 0, the roots are real and distinct, if Δ = 0, the roots are real and equal, and if Δ < 0, the roots are complex conjugates.
No, the quadratic discriminant formula is only applicable for quadratic equations of the form ax² + bx + c = 0.
"Tricky algebra" refers to the manipulation and simplification of equations involving quadratic discriminant, where one may have to use techniques such as completing the square or factoring to find the roots of a quadratic equation.
The quadratic discriminant formula is used in various fields such as physics, engineering, and economics to solve problems involving quadratic equations. It can be used to find the maximum or minimum values of a quadratic function, determine the nature of a projectile's trajectory, or analyze profit and loss in business.