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MathematicsMathematics
17 April, 14:41

What number must you add to complete the square?

x^2 + 8x = - 3

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  1. 17 April, 18:19
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    x^2 + 8x = - 3

    x^2 + 8x + 16 = - 3 + 16

    using a^2 + 2 a b + b^2 = (a+b) ^2

    x^2 + 8x + 16 = 13

    (x + 4) ^2 = 13

    answer : 16 is the number you must add to complete the square
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