Tìm x biết: a) (4x + 3)² - 16(x + 6) + 7(10x + 1) = 0, b) (9 - 2x)² - 4(x + 3)² = 81 - 24x, c) (9 - 2x)² - 4(x + 3)² = 81 - 24x, d) (x² - 1)² - 6(x - 1)(x + 1) = -9
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2. Tìm x biết:
a) (4x + 3)² - 16(x + 6) + 7(10x + 1) ≈ 0
b) (9 - 2x)² - 4(x + 3)² = 81 - 24x
c) (9 - 2x)² - 4(x + 3)² = 81 - 24x
d) (x² - 1)² - 6(x - 1)(x + 1) = -9