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5x2 + 2x - 3 = 0

5x2 + 5x - 3x - 3 = 0

5x(x + 1) - 3(x + 1) = 0

(5x - 3)(x + 1) = 0

So 5x - 3 = 0 or x + 1 = 0

ie x = 3/5 or x = -1

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