Toán Lớp 8: x^3-25x=0
tìm x bt, nhanh nhanh. Hạn 7h
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Toán Lớp 8: x^3-25x=0
tìm x bt, nhanh nhanh. Hạn 7h
Comments ( 2 )
=> x( x^2 – 25) = 0
=> x( x – 5)(x + 5) = 0
=> x = 0
TH1 : x -5 = 0
TH2: x + 5 = 0
=>
x = 5
x = -5