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HelloKitty17
 one year ago
Factor completely 10x2 + 2x – 8.
2(5x  1)(x + 4)
2(5x  4)(x + 1)
2(5x + 2)(x  2)
2(5x  2)(x + 2)
HelloKitty17
 one year ago
Factor completely 10x2 + 2x – 8. 2(5x  1)(x + 4) 2(5x  4)(x + 1) 2(5x + 2)(x  2) 2(5x  2)(x + 2)

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freckles
 one year ago
Best ResponseYou've already chosen the best response.0do you know the greatest common factor of 10,2,8?

freckles
 one year ago
Best ResponseYou've already chosen the best response.0great so when you factor out 2 you have \[10x^2+2x8 \\ 2(5)x^2+2(1)x2(4) \\ 2(5x^2+1x4)\] now let's look at factoring the thingy in ( ) That is let's look at factoring: \[5x^2+1x4 \text{ aka } 5x^2+x4\]

freckles
 one year ago
Best ResponseYou've already chosen the best response.0notice a=5 b=1 c=4 you are looking for two factors of ac that have product ac and sum b

freckles
 one year ago
Best ResponseYou've already chosen the best response.0that is what two integer numbers when you multiply them give you 20 and when you add them give you 1

freckles
 one year ago
Best ResponseYou've already chosen the best response.0Remember to not give direct answers in the future. Thank you kindly.
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