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Using exponent rules to evaluate expressions

By Khan Academy

Learn how to simplify expressions like (5^6)/(5^2). Also learn how 1/(a^b) is the same as a^-b. Towards the end of the video, we practice simplifying more complex expressions like (25 * x * y^6)/(20 * y^5 * x^2).

Factor perfect squares

By Khan Academy

Sal analyzes the factorization of x^2+5x+c as (x+d)^2 to find the values of the missing coefficients c and d.

Factor polynomials using quadratic methods

By Khan Academy

Sal factors -12f^2-38f+22 as -2(2f-1)(3f+11).

Factor quadratics with a leading coefficient of 1

By Khan Academy

Sal factors x^2-14x+40 as (x-4)(x-1) and x^2-x-12 as (x+3)(x-4).

Factor polynomials with special product forms

By Khan Academy

Sal factors 25x^4-30x^2+9 as (5x^2-3)^2.

Evaluate composite functions from graphs and tables

By Khan Academy

Sal explains what it means to compose two functions. He gives examples for finding the values of composite functions given the equations, the graphs, or tables of values of the two composed functions.