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11-9.

Sketch the graph of without using a graphing calculator. Do not scale your axes, but be sure to label the important points.

Since is a factor, is a root, or -intercept. Since the factor is squared, it is actually a double root, so the curve will "bounce" off of the -axis at this intercept.

Sketch a prediction of what the curve looks like without using a graphing calculator. Then, check you work with a graphing calculator, identifying and correcting any mistakes or misconceptions.

Compute without a calculator