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	13/09 13:58:17
	Toán học - Lớp 12 \| Toán học \| Lớp 12

Tìm x: a) 4x(3x – 7) – 6(2x² – 5x + 1) = 12 b) (5x + 3)(4x – 1) + (10x – 7)(–2x + 3) = 27 c) (8x – 5)(3x + 2) – (12x + 7)(2x – 1) = 17 d) (5x + 9)(6x – 1) – (2x – 3)(15x + 1) = – 190.

Tìm x:

a) 4x(3x – 7) – 6(2x² – 5x + 1) = 12

b) (5x + 3)(4x – 1) + (10x – 7)(–2x + 3) = 27

c) (8x – 5)(3x + 2) – (12x + 7)(2x – 1) = 17

d) (5x + 9)(6x – 1) – (2x – 3)(15x + 1) = – 190.