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Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

The probability that a student graduating from suburban state university has student loans to pay off after graduation is .60. if two students are randomly selected from this university, what is the probability that neither of them has student loans to pay off after graduation?

Prove that (x-2)is factor of p (x)=2x³-3x²-17x+30