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factor: x^2 – 8x + 15
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what two numbers could you multiply together to get 15 that add up to -8?
-5, -3
yes, so your factored for is (x-5) and (x-3)
how do you get that? i don't get it..
when you factor out a function that has a square all you're doing is finding the products that make that function. kinda like normal multiplication. so if you took (x-5) and (x-3) and multiplied them out you would end up with your original equation.
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okay, gotcha. thank you.
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