【高校　数学Ⅰ】　数と式５６　判別式Ｄ　（１２分）

Watch unlimited lessons from Try's talented instructors for free! The Try IT video lessons for junior high and high school students are designed to be easy to understand! You can use them for school preparation and review, as well as for regular tests and exam preparation. Lessons are taught by experienced, top-notch instructors known for their engaging and easy-to-understand teaching methods. *This lesson was created under the old curriculum. *Please watch with caution when using it to prepare for entrance exams or regular tests under the new curriculum. If you watch the video and think, "This is easy to understand!" or "I want to take a class like this!" Try's one-on-one instruction might be right for you. For more information about Try's one-on-one tutoring service, to request information, or to inquire, please click here. https://bit.ly/4hjhKSE In addition, +‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥+ Try offers free video lessons, "Try IT," to support home learning. "Try IT" is available free of charge even to non-members. Please use this to enhance your exam preparation and home study. Video Lessons: Try IT Official Website: https://bit.ly/4jLULBg +‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥+ This video lesson covers "High School Mathematics I: Numbers and Equations 56: Discriminant D" in approximately 12 minutes. The key to solving the problem is to use the discriminant D = b^2 - 4ac to determine the number of solutions. Please watch the video lesson in the following order: [Key Points] ⇒ [Example Problems] ⇒ [Practice] ⇒ [Summary]. If you have questions about any other units besides this one, please click on the URL below. You can watch all the video lessons for each unit together. ■If you have questions about "Mathematics I," click here! ・Mathematics I: Numbers and Expressions https://goo.gl/kkMY1W ・Mathematics I: Expanding Equations https://goo.gl/qgCjRb ・Mathematics I: Factoring and Cross-Dividing https://goo.gl/Ae70Kr ・Mathematics I: Rational Numbers, Irrational Numbers, and Square Roots https://goo.gl/VyO7Rv ・Mathematics I: Equations and Inequalities https://goo.gl/omHWxP ・Mathematics I: Absolute Value and Equations https://goo.gl/wv1T4f ・Mathematics I: Quadratic Equations https://goo.gl/tyqgHp ・Mathematics I: Sets https://goo.gl/uPzTs3 ・Mathematics I: Propositions and Necessary and Sufficient Conditions https://goo.gl/9uT75D ・Mathematics I: Graphing Quadratic Functions ht tps://goo.gl/sDgXo1 ・Mathematics I: Maximum and Minimum of Quadratic Functions https://goo.gl/fIsO2s ・Mathematics I: Applications of Quadratic Functions https://goo.gl/b4WFAW ・Mathematics I: Common Points of Parabolas and Lines https://goo.gl/igr3ek ・Mathematics I: Quadratic Inequalities https://goo.gl/21RZov ・Mathematics I: Trigonometric Ratios https://goo.gl/q0cers ・Mathematics I: Sine and Cosine Theorems https://goo.gl/W44zp2 ・Mathematics I: Applications to Area and Volume https://goo.gl/UPRHnx ・Mathematics I: Data Dispersion and Correlation https://goo.gl/4JhqPf ■If you have questions about "Mathematics A," click here! Mathematics A: Sets and Complements https://goo.gl/uB9WnZ Mathematics A: Number of Cases (Tree Diagrams, Sum Law, Product Law) https://goo.gl/OS72Rb Mathematics A: Permutations https://goo.gl/liNVCE Mathematics A: Circular and Duplicate Permutations https://goo.gl/8EQcDC Mathematics A: Combinatorics nCr https://goo.gl/EVfHms ・Mathematics A: Using Combinations https://goo.gl/vk57MX ・Mathematics A: Grouping https://goo.gl/qOYVj4 ・Mathematics A: Probability https://goo.gl/dhyIIV ・Mathematics A: Probability: Summation and Complementary Events https://goo.gl/3hQORr ・Mathematics A: Probability: Dice and Independent Trials https://goo.gl/Vfi70n ・Mathematics A: Probability: Dice and Repeated Trials https://goo.gl/ZCPe iC ・Mathematics A: Probability, Lottery, Multiplication Theorem https://goo.gl/UJSHxY ・Mathematics A: Properties of Integers https://goo.gl/of491x ・Mathematics A: Prime Factorization https://goo.gl/7ptLnq ・Mathematics A: Multiples and Divisors, Relatively Prime https://goo.gl/nGkFLS ・Mathematics A: Integer Solutions to Equations https://goo.gl/7C4xXf ・Mathematics A: Integer Solutions to Equations, Quotient and Remainder of Division https://goo.gl/BVW8MA ・Mathematics A: Euclid's Algorithms and Linear Indeterminate Equations https://goo.gl/ycG6An Mathematics A: Fractions and Decimals https://goo.gl/tqQTjF Mathematics A: n-ary Number System https://goo.gl/kt3HVR Mathematics A: Properties of Interior and Exterior Divisions of Lines and Parallel Lines https://goo.gl/fqLumM Mathematics A: Angle Bisectors of Triangles https://goo.gl/RncX40 Mathematics A: Circumcenter, Incenter, and Centroid of a Triangle https://goo.gl/IhYU3e Mathematics A: Ceva-Menelaus Theorem https://goo.gl/pq6m0Y ・Mathematics A: Circular Angle Theorem, Inscribed Angle Theorem https://goo.gl/uRoms0 ・Mathematics A: Tangents to Circles, Tangent String Theorem, Angular Power Theorem https://goo.gl/MPJCEH ・Mathematics A: Common Tangen...