the answers is d
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The discriminant of the given quadratic expression is -7
This quadratic expression can't be factored because its discriminant is less than zero.
(x2+3x-4) (x-4)
x2 + 3x + 7 = 5 ∴ x2 + 3x + 2 = 0 ∴ (x + 1)(x + 2) = 0 ∴ x ∈ {-2, -1}
x2 + 3x + 2 factors into (x + 1) (x + 2)