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⇔ 3x² - 16x -35 = 0
⇔ (3x + 5)(x -7) = 0
3x + 5 = 0
x1 = -5/3
x - 7 = 0
x2 = 7
HP = { -5/3, 7 }
2. 3a(a-2) = 2(a+5) -9a
⇔ 3a² -6a -2a -10 +9a = 0
⇔ 3a² + a - 10 = 0
(3a - 5)(x +2) = 0
x1 = 5/3 √ x2 = -2
HP ={ -2, 5/3}
3. 7/x - 1/x² = 6
⇔( 7x - 1 )/ x² = 6
⇔ 7x - 1 = 6x²
6x² - 7x + 1 = 0
(6x - 1)(x - 1) = 0
x1 = 1/6 √ x2 = 1
HP= { 1/6, 1}