Tìm giá trị của x biết
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Bài 4. Tìm x, biết
a) (x + 1)(x + 3) = x(x + 2) = 7
b) 2x(3x + 5)-x(6x - 1) = 33
c) (3x - 5)(2x-1)-(x + 2)(6x - 1) = 0
d) (x-2)³(x+5)(x² - 5x+25) + 6x² = 11
e) (x + 1)(x²-x+1)-x(x-3)(x + 3) = 8
f) (x+3)³-x(3x + 1)² + (2x + 1)(4x² - 2x + 1) - 3x² = 54
g) 2x(x-3) + 5(3-x) = 0
h) x2 – 5x+ 6 = 0
j)
i) (x²-4)-(x-2)(3-2x)=0
(x³-27)-(3-x) (6x + 9) = 0
k) 4x² - 9 = (3x + 1)(2x - 3)
1) 4(x - 2)² = 25(1-2x)²
Bài 4. Tìm x, biết
a) (x + 1)(x + 3) = x(x + 2) = 7
b) 2x(3x + 5)-x(6x - 1) = 33
c) (3x - 5)(2x-1)-(x + 2)(6x - 1) = 0
d) (x-2)³(x+5)(x² - 5x+25) + 6x² = 11
e) (x + 1)(x²-x+1)-x(x-3)(x + 3) = 8
f) (x+3)³-x(3x + 1)² + (2x + 1)(4x² - 2x + 1) - 3x² = 54
g) 2x(x-3) + 5(3-x) = 0
h) x2 – 5x+ 6 = 0
j)
i) (x²-4)-(x-2)(3-2x)=0
(x³-27)-(3-x) (6x + 9) = 0
k) 4x² - 9 = (3x + 1)(2x - 3)
1) 4(x - 2)² = 25(1-2x)²