CPM Homework Help : AC Problem 8-89

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8-89.

Calculate the expressions below. Then compare your answers from parts (a) and (b) to those in in problem 8-88. What do you notice?

$\frac{-6+\sqrt{6^2-4(1)(-40)}}{2\cdot1}$
Hint (a):
Remember Order of Operations when solving these.

$\frac{-6-\sqrt{6^2-(4)(1)(-40)}}{2\cdot1}$
Hint (b):
This may look similar to part (a), but note there is a minus sign in this one.

$\frac{-13-\sqrt{13^2-(4)(2)(-24)}}{2\cdot2}$
Hint (c):
Check the signs carefully.

$\frac{-13+\sqrt{13^2-(4)(2)(-24)}}{2\cdot2}$
Hint (d):
Check the signs carefully.

Partial Answer:

The answers you get for parts (a) through (d) will match those found in problem 8-88.

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