Answer:
Explanation:
(2x-5) (4x+1)
8x^2 - 18x - 5
= 8x^2 - (20-2)x - 5
= 8x^2 - 20x + 2x - 5
= 4x ( 2x - 5) + 1 (2x - 5)
= (2x-5) (4x+1)
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