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= 1/2 . (5x + 3) . (2x -2)
= 1/2 . (10x² - 10x + 6x - 6)
= 1/2 . (10x² - 4x - 6)
= 1/2 . 2(5x² - 2x - 3)
= 5x² - 2x -3
L= 1/2 x (5x+3) x (2x-2)
= 1/2 x 10x² - 4x - 6
=5x² -2x-3 cm²
(5x+3)(x-1)
x=-3/5
x=1