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7 March, 02:37

What value of b makes the trinomial below a perfect square x^2-bx+36?

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  1. 7 March, 02:51
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    (Half of b) ²=36

    half of b=6 or half of b=-6

    b=12 or b=-12

    Note: the perfect square is either (x+6) ² or (x-6) ²
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