31. 15x² + 2x -8. answer=. ???
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Step-by-step explanation:
15x² + 2x - 8
=> 15x² + (12-10)x - 8 [15 × 8 = 120
120 = 12×10 , 12-10 = 2]
=> 15x² + 12x - 10x - 8
=> 3x(5x-4) - 2x (5x-4)
=> (5x-4) (3x-2x)
=> (5x-4) x
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