Roots Of A Quadratic Equation
Bayani Gaba-gaba
Every quadratic equation can be solved with a single formula, but the real power lies in knowing what kind of answer to expect before you even start solving. The discriminant tells you at a glance whether an equation has two distinct roots, one repeated root, or no real roots at all.
In this topic you will master the quadratic formula and learn to use the discriminant to classify the roots of any quadratic. You will also see how the discriminant connects to the shape of a parabola and tackle problems where the nature of the roots depends on an unknown parameter.
Manufura
- Use the quadratic formula to solve quadratic equations
- Use the discriminant to identify whether the roots are equal real, unequal real or not real
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Barka da kammala darasi akan Roots Of A Quadratic Equation. Yanzu da kuka bincika mahimman ra'ayoyi da ra'ayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
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- What is the discriminant of the equation 2x^2 + 3x - 5 = 0? A) -31 B) 49 C) 31 D) -49 Answer: B
- If the discriminant of a quadratic equation is zero, the equation has: A) Two distinct real roots B) No real roots C) Two equal real roots D) One positive and one negative root Answer: C
- For which value of k does x^2 + kx + 16 = 0 have equal roots? A) 4 B) 6 C) 8 D) 12 Answer: C
- The quadratic 3x^2 - x + 2 = 0 has: A) Two distinct real roots B) Two equal roots C) No real roots D) One real root Answer: C
- Which expression gives the discriminant of ax^2 + bx + c = 0? A) b^2 + 4ac B) b^2 - 4ac C) 4ac - b^2 D) b - 4ac Answer: B
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Sashen littafi
Quadratic Equations
Solve quadratic equations by factoring.
"College Algebra: Quadratic Equations" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/college-algebra/pages/2-5-quadratic-equations. Access for free at https://openstax.org/books/college-algebra/pages/1-introduction
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