Exercicios de equações2 grau

1. RESOLVA AS EQUAÇÕES
DE 2º GRAU
1) x² - 5x + 6 = 0 (R: 2, 3)
2) x² - 8x + 12 = 0 (R: 2, 6)
3) x² + 2x - 8 = 0 (R: 2, -4)
4) x² - 5x + 8 = 0 (R: vazio)
5) 2x² - 8x + 8 = 0 (R: 2,)
6) x² - 4x - 5 = 0 (R: -1, 5)
7) -x² + x + 12 = 0 (R: -3, 4)
8) -x² + 6x - 5 = 0 (R: 1, 5)
9) 6x² + x - 1 = 0 (R: 1/3 , -1/2)
10) 3x² - 7x + 2 = 0 (R: 2, 1/3)
11) 2x² - 7x = 15 (R: 5, -3/2)
12) 4x² + 9 = 12x (R: 3/2)
13) x² = x + 12 (R: -3 , 4)
14) 2x² = -12x - 18 (R: -3 )
15) x² + 9 = 4x (R: vazio)
16) 25x² = 20x – 4 (R: 2/5)
17) 2x = 15 – x² (R: 3, -5)
18) x² + 3x – 6 = -8 (R: -1, -2)
19) x² + x – 7 = 5 (R: -4 , 3)
20) 4x² - x + 1 = x + 3x² (R: 1)
21) 3x² + 5x = -x – 9 + 2x² (R: -3)
22) 4 + x ( x - 4) = x (R: 1,4)
23) x ( x + 3) – 40 = 0 (R: 5, -8)
24) x² + 5x + 6 = 0 (R:-2,-3)
25) x² - 7x + 12 = 0 (R:3,4)
26) x² + 5x + 4 = 0 (R:-1,-4)
27) 7x² + x + 2 = 0 (vazio)
28) x² - 18x + 45 = 0 (R:3,15)
29) -x² - x + 30 = 0 (R:-6,5)
30) x² - 6x + 9 = 0 (R:3)
RESOLVA AS EQUAÇÕES
DE 2º GRAU
1) x² - 5x + 6 = 0 (R: 2, 3)
2) x² - 8x + 12 = 0 (R: 2, 6)
3) x² + 2x - 8 = 0 (R: 2, -4)
4) x² - 5x + 8 = 0 (R: vazio)
5) 2x² - 8x + 8 = 0 (R: 2,)
6) x² - 4x - 5 = 0 (R: -1, 5)
7) -x² + x + 12 = 0 (R: -3, 4)
8) -x² + 6x - 5 = 0 (R: 1, 5)
9) 6x² + x - 1 = 0 (R: 1/3 , -1/2)
10) 3x² - 7x + 2 = 0 (R: 2, 1/3)
11) 2x² - 7x = 15 (R: 5, -3/2)
12) 4x² + 9 = 12x (R: 3/2)
13) x² = x + 12 (R: -3 , 4)
14) 2x² = -12x - 18 (R: -3 )
15) x² + 9 = 4x (R: vazio)
16) 25x² = 20x – 4 (R: 2/5)
17) 2x = 15 – x² (R: 3, -5)
18) x² + 3x – 6 = -8 (R: -1, -2)
19) x² + x – 7 = 5 (R: -4 , 3)
20) 4x² - x + 1 = x + 3x² (R: 1)
21) 3x² + 5x = -x – 9 + 2x² (R: -3)
22) 4 + x ( x - 4) = x (R: 1,4)
23) x ( x + 3) – 40 = 0 (R: 5, -8)
24) x² + 5x + 6 = 0 (R:-2,-3)
25) x² - 7x + 12 = 0 (R:3,4)
26) x² + 5x + 4 = 0 (R:-1,-4)
27) 7x² + x + 2 = 0 (vazio)
28) x² - 18x + 45 = 0 (R:3,15)
29) -x² - x + 30 = 0 (R:-6,5)
30) x² - 6x + 9 = 0 (R:3)
RESOLVA AS EQUAÇÕES
DE 2º GRAU
1) x² - 5x + 6 = 0 (R: 2, 3)
2) x² - 8x + 12 = 0 (R: 2, 6)
3) x² + 2x - 8 = 0 (R: 2, -4)
4) x² - 5x + 8 = 0 (R: vazio)
5) 2x² - 8x + 8 = 0 (R: 2,)
6) x² - 4x - 5 = 0 (R: -1, 5)
7) -x² + x + 12 = 0 (R: -3, 4)
8) -x² + 6x - 5 = 0 (R: 1, 5)
9) 6x² + x - 1 = 0 (R: 1/3 , -1/2)
10) 3x² - 7x + 2 = 0 (R: 2, 1/3)
11) 2x² - 7x = 15 (R: 5, -3/2)
12) 4x² + 9 = 12x (R: 3/2)
13) x² = x + 12 (R: -3 , 4)
14) 2x² = -12x - 18 (R: -3 )
15) x² + 9 = 4x (R: vazio)
16) 25x² = 20x – 4 (R: 2/5)
17) 2x = 15 – x² (R: 3, -5)
18) x² + 3x – 6 = -8 (R: -1, -2)
19) x² + x – 7 = 5 (R: -4 , 3)
20) 4x² - x + 1 = x + 3x² (R: 1)
21) 3x² + 5x = -x – 9 + 2x² (R: -3)
22) 4 + x ( x - 4) = x (R: 1,4)
23) x ( x + 3) – 40 = 0 (R: 5, -8)
24) x² + 5x + 6 = 0 (R:-2,-3)
25) x² - 7x + 12 = 0 (R:3,4)
26) x² + 5x + 4 = 0 (R:-1,-4)
27) 7x² + x + 2 = 0 (vazio)
28) x² - 18x + 45 = 0 (R:3,15)
29) -x² - x + 30 = 0 (R:-6,5)
30) x² - 6x + 9 = 0 (R:3)