Asked by rajat951 | 2nd Mar, 2010, 06:50: PM
The trick in such examples is to transform or identify the hidden quadratic equation, then find it's root.
The procedure is illustrated below.
1/ 5(3x + y)2 + 6(3x + y) - 8
Let (3x + y) = X
5X2 + 6X - 8
Roots of this quadratic equation are,
The roots are, -2 and 4/5,
(3x + y + 2)(3x + y - 4/5)
Hence, factorization of,
5(3x + y)2 + 6(3x + y) - 8 is,
(3x + y + 2)(3x + y - 4/5).
Similarly other two can be solved.
Answered by | 2nd Mar, 2010, 07:06: PM
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