Algebraic identity
An algebraic identity is a statement of equality between two algebraic expressions, but it is satisfied for all values of the variabl..
.. Access full lesson containing this video at: www.yourteacher.com Students learn to multiply a binomial times a trinomial, such as (r -- 7)(r^2 + 6r + 2), by distributing each of the terms in the binomial through the trinomial, then combing like terms. Students also learn to simplify a binomial cubed, such as (3c -- 2)^3, by rewriting the problem as (3c -- 2)(3c -- 2)(3c -- 2), FOILing the first two binomials together, then multiplying the resulting trinomial times the last binomial, and ...
Access full lesson containing this video at: www.yourteacher.com Students learn to solve quadratic equations in the form ax^2 + bx + c = 0 using the quadratic formula, which states that x = -b plus or minus the square root of b^2 -- 4ac over 2a. For example, to solve the equation x^2 -- 3x -- 8 = 0, since a = 1, b = -3, and c = -8, the quadratic formula states that x = 3 plus or minus the square root of (-3)^2 -- 4(1)(-8) over 2(1). Simplifying on the right side of the equation, x = 3 plus ...
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