Factor x2 − 7x + 8. (x + 8)(x − 1) prime (x − 8)(x − 1) (x + 8)(x + 1)

Prime

Step-by-step explanation:

The roots are irrational. (If they were rational, they would be factors of 8.) As a consequence, the expression has no factoring in integers, making it prime.

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Roots are (7±√(7²-32))/2 = 3.5±√4.25.

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.

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step-by-step explanation: