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

Toán Lớp 9: Căn x – 3căn x = -6 Mn giúp em vs ạ

Toán Lớp 9: Căn x – 3căn x = -6
Mn giúp em vs ạ

Comments ( 1 )

  1. x – 3.√x = -6 ⇔ x – 3.√x + 6 =0 ⇔ x- 2.3/2.√x + 9/4 + 15/4 = 0 ⇔ (√x – 3/2)² = -15/4 (vô lí)
    vậy phương trình vô nghiệm

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

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