Uploaded August 2026 | Updated September 2026, 2 weeks ago
"Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!
khanacademy.org/math/algebra-1-illustrative-math/x6418b49dfbc9d0c9:quadratic-equations-part1/x6418b49dfbc9d0c9:quadratic-equations-with-irrational-solutions/v/exact-vs-approximate-solutions-to-quadratic-equations
Solve a quadratic equation by completing the square and by graphing, then compare the exact and approximate solutions.
Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!
Donate or volunteer today! Donate here: khanacademy.org/donate?utm_source=youtube&utm_medium=desc
Volunteer here: khanacademy.org/contribute?utm_source=youtube&utm_medium=desc"
"Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!
khanacademy.org/math/algebra-1-illustrative-math/x6418b49dfbc9d0c9:quadratic-equations-part1/x6418b49dfbc9d0c9:quadratic-equations-with-irrational-solutions/v/exact-vs-approximate-solutions-to-quadratic-equations
Solve a quadratic equation by completing the square and by graphing, then compare the exact and approximate solutions.
Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!
Donate or volunteer today! Donate here: khanacademy.org/donate?utm_source=youtube&utm_medium=desc
Volunteer here: khanacademy.org/contribute?utm_source=youtube&utm_medium=desc"
