maths

Determine the nature of the roots of the following quadratic equations:

(a) 3x^2 - 6x + 7 = 0

(b) 3x^2 + 6x - 7 = 0

(c) -5x^2- x/5 = 0

(d) 4x^2 - 28/3x + 49/9 = 0

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  1. check the discriminants

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