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25 April, 21:20

Complete the sqaure - 32=2 (x^2+10x)

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  1. 25 April, 23:03
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    -32=2 (x^2+10x)

    -32=2x^2+20x

    -2x^2-20x-32=0

    -2 (x+2) (x+8) = 0

    therefore,

    x+2=0 or x+8=0

    so, ... x = - 2 or - 8
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