They must be even.
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Each has two binomial factors.
81w2 - p2 = (9w + p) (9w - p)because 81w2 - p2 is the difference of squares. To factor the difference of squares, square root both terms and write the binomial twice:(9w ? p) (9w ? p)Now, to replace the question marks, one binomial has to replace it with the plus sign, while the other binomial gets a minus sign:(9w + p) (9w - p)
The difference of 2 squares ca n be expressed as: x2 - y2
The difference of two squares which enables complex conjugates to be used.The difference of two squares which enables complex conjugates to be used.The difference of two squares which enables complex conjugates to be used.The difference of two squares which enables complex conjugates to be used.
For the first step, express this as a difference of two squares, and use the corresponding formula. After factoring this, one of the two factors will again be the difference of two squares, and can be further factored.