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2^(2x^2 + 5x - 1) = 2.2^3(x - 3)
2^(2x^2 + 5x - 1) = 2.2^(3x - 9)
2^(2x^2 + 5x - 1) = 2^1 × 2^(3x - 9)
2^(2x^2 + 5x - 1) = 2^(3x - 8)
2x^2 + 5x - 1 = 3x - 8
2x^2 + 2x + 7
a = 2 ; b = 2 ; c = 7
x1 + x2 = -b/a
= -2/2
= -1 (B)