book Maths Puzzle Numerical Ability

How do you factor the polynomial (x^3+8x^2+17x+10 completely, given that x+2 is a factor?

I'm at the end of my rope!

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book Other Question

How many pounds of candy selling for $5.80 per pound should be mixed with 7 pounds of candy selling for $2.40 per pound to obtain a mixture selling for $3.42 per pound? Suppose that an experiment is repeated four times. A certain event has probability 1/10 in a single repetition of the experiment. What is the probability that it occurs at least once?