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1.
- A. 3
- B. 3
- C. 3
- D. 3
Answer: Option B
Explanation:
5a ^ 2 - 4a - 3 - 3(a ^ 2 + a + 4) = 0 5a ^ 2 - 4a - 3 - 3a ^ 2 - 3a - 12 = 0 2a ^ 2 - 7a - 15 = 0 → 2a ^ 2 - 10a + 3a - 15 = 0 a - 5 = 0 a = 5
* 2a(a - 5) + 3(a - 5) = 0
Rightarrow (a - 5)(2a + 3) = 0
2a + 3 = 0
a = - 3/2
5 + (- 3/2) = 5 - 3/2 = (10 - 3)/2 = 7/2 = 3.5
* 2a(a - 5) + 3(a - 5) = 0
Rightarrow (a - 5)(2a + 3) = 0
2a + 3 = 0
a = - 3/2
5 + (- 3/2) = 5 - 3/2 = (10 - 3)/2 = 7/2 = 3.5
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