Search results
Learn how to find the roots of a quadratic equation using different methods such as factoring, quadratic formula, completing the square, and graphing. See the definition, nature, sum, product, and discriminant of the roots with examples and practice problems.
We shall learn how to find the roots of quadratic equations algebraically and using the quadratic formula. The general form of a quadratic equation is ax 2 + bx + c = 0, where x is the unknown and a, b and c are known quantities such that a ≠ 0.
- The roots of a quadratic equation are those values of the unknown for the equation is equal to zero.
- A quadratic equation has 2 roots, they may be equal or distinct.
- The roots of a quadratic equation may be determined by factorising the given equation and by using the quadratic formula.
- If the given quadratic equation has real roots then the value of the discriminant D ≥ 0.
- If the value of the discriminant D = 0 then the quadratic equation has real roots.
May 28, 2024 · Learn how to find the roots or zeros of a quadratic equation using different methods such as quadratic formula, factoring, completing the square and graphical method. See examples, nature of roots, sum and product of roots and practice problems.
- 6 min
Learn how to find the roots of a quadratic equation using the quadratic formula, completing the squares, or factoring. Explore the nature of roots based on the discriminant value and the range of the quadratic expression.
Learn how to use the quadratic formula to solve quadratic equations, and see how it relates to factoring and completing the square. The quadratic formula is x = − b ± b 2 − 4 a c 2 a, where a, b, and c are the coefficients of the equation.
- Good question! It is derived from the Latin word quadrare, which means "to square", which is what you do in quadratics. Though you may think it mea...
- Good question! First note, a "trinomial" is not necessarily a third degree polynomial. A trinomial is a polynomial with 3 terms. It can have any de...
- Yes, you can use the quadratic formula for all quadratic equations.
- if you mean find the solution, yes, you would get -3 and 1. If you want to factor it would be (x + 3) (x - 1). The quadratic formula helps you find...
- In 1827, a mathematician by the last name of Abel proved that there is no way to make an analogous equation past the 4th degree. One example (I fou...
- If the coefficient of x^2 is negative, the curve will look like an upside down u (i.e. the curve will have an absolute maximum). If the coefficient...
- Yes x with a little 2 to its top right is x to the power of 2, but for future reference when typing x to the power of 2 on the computer the convent...
- Start from the beginning of Khan Academy. Work through it *Lesson* by *Lesson*. Make sure not to skip any lessons or videos. This might help.
A quadratic equation always has two roots, if complex roots are included; and a double root is counted for two. A quadratic equation can be factored into an equivalent equation [3] where r and s are the solutions for x.
Learn what quadratic equations are, how to write them in standard form, and how to find their roots using different methods. See examples of quadratic equations with and without constant, linear and quadratic terms.
