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Verified answer
11)(2x+2) x + (3x).1 = 3
2x²+2x+3x = 3
2x²+5x-3 = 0
(2x-1)(x+3) = 0
2x-1 = 0 atau x+3 = 0
x = 1/2 atau x = -3
12)
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