SOLUTION: I don't understand how to do this... REWRITE THE MIDDLE TERM AS THE SUM OF TWO TERMS AND THEN FACTOR COMPLETELY. 4Z^3 - 18Z^2

SOLUTION: I don't understand how to do this... REWRITE THE MIDDLE TERM AS THE SUM OF TWO TERMS AND THEN FACTOR COMPLETELY. 4Z^3 - 18Z^2 - 10Z

Question 44878: I don't understand how to do this...
REWRITE THE MIDDLE TERM AS THE SUM OF TWO TERMS AND THEN FACTOR COMPLETELY.
4Z^3 - 18Z^2 - 10Z
Answer by psbhowmick(878) (Show Source): You can put this solution on YOUR website!

=

So we have to factorise .

See my solution to the problem mentioned below for more detailed conception of how to solve such problems.
http://www.algebra.com/cgi-bin/jump-to-question.mpl?question=44877

1. 2 x (-5) = -10
2. 1 x (-10) = -10 and -9 = 1 + (-10)
3. Given expression: .
4. Taking common terms in brackets: .
5. Re-writing the expression we get the factors: .
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