Question

Factories : 9(x-2y)square - 4(x-2y) - 13

Answer 1

Solution:

9(x-2y)²-4(x-2y)-13

= 9(x-2y)²+9(x-2y)-13(x-2y)-13

= 9(x-2y)[x-2y+1]-13(x-2y+1)

= (x-2y+1)[9(x-2y)-13]

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