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4 September, 17:29

Solve the question by completing the sqaure x² + 4x = 0?

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  1. 4 September, 17:54
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    x = 0 or - 4

    Step-by-step explanation:

    x² + 4x = 0

    To complete the square, take half of the middle coefficient, square it, then add to both sides.

    (4/2) ² = 2² = 4

    x² + 4x + 4 = 4

    (x + 2) ² = 4

    x + 2 = ±2

    x = - 2 ± 2

    x = 0 or - 4
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