A. Find the roots of the following quadratic equations using any appropriate method.
1.3x2 = 27
2. (x + 4)2 = 25
3. 9x2 -- 18x = 0
4. 12x - 8x2 = 0
5. x2 + 8x + 15 = 0
6.9x2 + 15% +4=0
7. 4x2 + 28x + 4.9 = 0
8. (X - 3)2 = 4x
9. x2 - 14x - 36 0
10. x2 - 3x + 1 = 0
1.3x2 = 27
2. (x + 4)2 = 25
3. 9x2 -- 18x = 0
4. 12x - 8x2 = 0
5. x2 + 8x + 15 = 0
6.9x2 + 15% +4=0
7. 4x2 + 28x + 4.9 = 0
8. (X - 3)2 = 4x
9. x2 - 14x - 36 0
10. x2 - 3x + 1 = 0
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Answer:
1. x= - 3, x= 3
2. x= -9, x= 1
3. x= square root of - 2, x= square root of 2
4. x= 0, x= 3/2
5. x= - 5, x= - 3
Answer:
.13×2=27
2.Z×+4/2=43
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