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Find the factors for
Solution:
Consider the given equation above
Did you notice that the given equation is a quadratic equation of variables (x - 9b) and y? (x - 9b) is considered as a single variable. We have to do the trial and error method in getting the factors of (x - 9b)² and -2y² so that the middle term must be -(x - 9b)y. Let's start the factoring of the given equation as follows
The middle term is
Since the value of the above calculation is the same as the middle term of the given equation which is -y(x - 9b), then the factors of the given equation are
