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

Toán Lớp 9: Tính a.2√x +4=-3 b.2√x +4=-1 c.2√x+4=-9

Toán Lớp 9: Tính a.2√x +4=-3
b.2√x +4=-1
c.2√x+4=-9

Comments ( 1 )

  1. a.2√x +4=-3 ⇔ 2√x=-7⇔√x=-3,5( vô lí)
    b.2√x +4=-1 ⇔ 2√x=-5⇔√x=-2,5 (vô lí)
    c.2√x+4=-9 ⇔ c.2√x=-13 ⇔√x=-6,5(vô lí)

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

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