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8 March, 01:08

What number can make this trinomial a perfect square trinomial 4x²+_x+81

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  1. 8 March, 01:21
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    36

    Step-by-step explanation:

    4x² + _x + 81

    √4 = 2

    √81 = 9

    2 (2) (9) = 36
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