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17 April, 01:55

What value in place of the question mark makes the polynomial below a perfect square trinomial? 9x2+? x+64

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  1. 17 April, 03:46
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    9x² + bx + 64

    / / (9x²) = 3x

    //84 = 8

    2*3x*8 = 48x

    b = 48
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