Using factorization, find the roots of the quadratic equation: y ²+2 y + 3 =0.

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Using factorization, find the roots of the quadratic equation: z ²-z+ =0.
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Using factorization, find the roots of the quadratic equation: z ²-z+ =0.
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Using factorization, find the roots of the quadratic equation: x ²-4qx+4q ²=0.
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Using factorization, find the roots of the quadratic equation: z ²-2z-8= 0.