Toán Lớp 7: Tìm x, biết :
(8x + 2)(1 – 3x) + ( 6x – 1 )(4x – 10) = -50
Giúp mình với, hứa vote 5 sao.
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Toán Lớp 7: Tìm x, biết :
(8x + 2)(1 – 3x) + ( 6x – 1 )(4x – 10) = -50
Giúp mình với, hứa vote 5 sao.
Comments ( 2 )
=> (-24x² + 2x + 2) + (24x² – 16x + 10) = -50
=> -14x + 12 = -50
=> 14x = 62
=> x = 31/7