Find the value of x for the given equation 3x2 + 5x – 2 = 0
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e - 2 and 1/3
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Understanding Tricks |
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Application We have to find 3x2 + 5x – 2 = 0 From the quadric equation x = - b ± √(b2 - 4ac)/2a x = - 5 ± √(52 - 4 × 3 × -2)/2 × 3 x = - 5 ± √(25 + 24)/6 x = - 5 ± √(49)/6 |
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So x = (- 5 ± 7)/6 x = 2/6 = 1/3 and -12/6 = -2 |