(PLEASE HELP!!) Jamal is solving the equation 2x2+7x−5=0 with the quadratic formula.

Which values could he use for a, b, and c?

a = -2, b = -7, c = 5

a = 2, b = 7, c = -5

a = 2, b = -7, c = -5

a = 2, b = 7, c = 5

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Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?