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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 9: x ²-24x+92 mong mọi người trả lời hộ

Toán Lớp 9: x ²-24x+92
mong mọi người trả lời hộ

Comments ( 1 )

  1. x^2-24x+92
    =x^2-2.12.x+144-52
    =(x-12)^2-52
    $=(x-12-\sqrt{52})(x-12+\sqrt{52})$
    $=(x-12-2\sqrt{13})(x-12+2\sqrt{13})$

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222-9+11+12:2*14+14 = ? ( )