OpenStax ([ Ссылка ]) is a set of high-quality textbooks in various subjects which are in use in many schools, colleges, and universities across the country. They are produced by Rice University, and are free for the downloading to anyone. I am endeavoring to provide free, worked-out solutions to the odd-numbered problems in the text.
I am a retired high school math teacher, and I hold an M.S. degree in Mathematics from Cal Poly SLO. I have also written and edited various works in mathematics.
Be sure to check out the two BONUS examples after Exercise 93: Bonus A: Deriving the quadratic formula from the general quadratic equation by completing the square, and Bonus B: Finding the coordinates of the vertex of a quadratic function directly from the equation f(x) = ax^2 + bx + c.
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Download the text for Precalculus for free at [ Ссылка ].
