integral (5x-2) ( 4x+3) dx=
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integral (5x-2) ( 4x+3) dx=
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∫ (5x -2 )(4x + 3) dx
= ∫ (20x² + 15x - 8 x - 6 ) dx
= ∫ (20 x² + 7x - 6 ) dx
= 20 (1/3) x³ + 7 (1/2 )x² - 6x + c
= 20/3 x³ + 7/2 x² - 6x + c