railway RRB Technician Grade 1 Mock Test 2024 Quantitative Aptitude Algebra Quadratic Equation

If the roots of the equation (b - c)x2 + (c - a)x + (a - b) = 0 are equal, 

1
2b = a + c
2
2c = a + b
3
2a = b + c
4
None of these
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