1. x = -1
2. x = –20/17
3.x = – 1/7
4.x = 2/5
5. x€R
1. p(×)=×3+2×2-5×-6
0 = 3x + 4 - 5x - 6
2× = -2 = x = -1
2. P(×)=2×3+13×2+17×-12
0 = 6 + 26 + 17x - 12
0 = 20 + 17x
-17x = 20 = x = – 20/17
3. P(×)=2×4+3×3-12×2-7×+6
0 = 8 + 9 - 24 - 7x + 6
0 = -1 - 7x
7x = -1 = x = – 1/7
4. P(×)=×3-×2+4×-2
0 = 3x - 2x + 4x - 2
0 = 5x - 2
-5x = -2 = x = 2/5
5. P(×)=×5-3×4+3×3-9×2+2×-6 = x€R
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Answers & Comments
Answer:
1. x = -1
2. x = –20/17
3.x = – 1/7
4.x = 2/5
5. x€R
Solution:
1. p(×)=×3+2×2-5×-6
0 = 3x + 4 - 5x - 6
2× = -2 = x = -1
2. P(×)=2×3+13×2+17×-12
0 = 6 + 26 + 17x - 12
0 = 20 + 17x
-17x = 20 = x = – 20/17
3. P(×)=2×4+3×3-12×2-7×+6
0 = 8 + 9 - 24 - 7x + 6
0 = -1 - 7x
7x = -1 = x = – 1/7
4. P(×)=×3-×2+4×-2
0 = 3x - 2x + 4x - 2
0 = 5x - 2
-5x = -2 = x = 2/5
5. P(×)=×5-3×4+3×3-9×2+2×-6 = x€R