This video shows how the sum of any rational number and any irrational number will always be an irrational number.
This video goes over the proof of the Remainder Theorem.
This video covers the proof of the quadratic formula using the method of completing the square.
This video proves that the base angles in isosceles triangles are congruent, and conversely, that triangles with congruent base angles are isosceles. It also proves that the perpendicular to the base of an isosceles triangle bisects it.
In this Khan Academy activity, students will prove geometric statements using criteria for triangle congruence (ASA, SAS, SSS, HL) to determine whether angle and triangles are congruent.
In this Khan Academy activity, students will rewrite expressions as a sum of terms, where each term is in the form k*b^n.
In this Khan Academy activity, students will rewrite expressions with rational exponents into equivalent expressions using the properties of exponents.
This video discusses how to tell proportional relationships by drawing graphs.
This video discusses Sigmund Freud's psychoanalytic theory of personality and the different structures of our mind that contribute to our personality.
This video models a context that concerns a candy vending machine. The model turns out to be a quadratic inequality.
This video solves the system y=x+1 and x^2+y^2=25.
This video solves a system of a quadratic equation and a linear equation by graphing both equations and looking for their intersections, and then checks the solution algebraically.
This video that solves a word problem about a ball being shot in the air. The equation for the height of the ball as a function of time is quadratic.
In this Khan Academy activity, students will be given a quadratic function from a word problem and be asked different questions about that model.
This video shows that the Fundamental Theorem of Algebra holds for polynomials of the second degree.
In this Khan Academy activity, students will solve a quadratic by factoring it.
In this Khan Academy activity, students will solve a quadratic by factoring it.
Video that analyzes a given solution of a quadratic equation, and finds where and what was the error in that process.
For this activity, students identify the length of a given side based on the coordinates provided.
In this Khan Academy activity, students will find the length of an arc when the central angle is given in radians.