Get out your homework, but keep it at your desk..

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Presentation transcript:

Get out your homework, but keep it at your desk.

Dividing Polynomials get out a coin for the traffic signal

Review of long division…

Remember all exponents must be accounted for and have a place holder when dividing…

Review of synthetic division… Remember the divisor must be in the form (x – k) to use this method. In other words, the leading coefficient and the exponent on x must be 1.

The Remainder theorem… Given f(x) = x 4 – 10x 2 – 2x + 4 Find f(-3).

Factor Theorem… What makes a number a “factor” of another number? For example…why is 3 a factor of 12? (x – k) is a factor of f(x) if and only if the remainder is 0 … f(k) = 0.

Show that x = -4 is a solution to x 3 – 28x – 48 = 0. Use this to completely factor f(x) = x 3 – 28x – 48 Show that x = -2 is a solution to x 3 + 2x 2 – 3x – 6 = 0. Use this to completely factor f(x) = x 3 + 2x 2 – 3x – 6

Use the graph to guess possible linear factors of f(x). Then completely factor f(x). F(x) = 5x 3 – 12x 2 – 23x + 42