Question

Resolva as equações:
1)x² - 5x + 6 = 0
2) x² - 8x + 12 = 0
3) x² + 2x - 8 = 0
4) x² - 5x + 8 = 0
5) 2x² - 8x + 8 = 0
6) x² - 4x - 5 = 0
7) -x² + x + 12 = 0
8) -x² + 6x - 5 = 0
9) 6x² + x - 1 = 0
10) 3x² - 7x + 2 = 0
11) 2x² - 7x = 15
12) 4x² + 9 = 12x
13) x² = x + 12
14) 2x² = -12x - 18
15) x² + 9 = 4x

Answer 1

1) x' = 3; x'' = 2
2) x' = 6 ; x'' = 2
3) x' = 2 ; x'' = -4
4) x' // x'' ∉ R
5) x' = 2 ; x'' = 2
6) x' = 5 ; x'' = -1
7) x' = -3 ; x'' = 4
8) x' = 1 ; x'' = 5
9) x' = 0,333... ; x''= -1/2
10) x' = 2 ; x'' = 0,333...
11) x' = 5 ; x'' = -3/2
12) x' = 3/2 ; x'' = 3/2
13) x' = 4 ; x'' = -3
14) x' = -3 ; x'' = -3
15) x' // x'' ∉ R