HelloKitty17
  • HelloKitty17
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)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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freckles
  • freckles
do you know the greatest common factor of 10,2,8?
HelloKitty17
  • HelloKitty17
2
freckles
  • freckles
great so when you factor out 2 you have \[10x^2+2x-8 \\ 2(5)x^2+2(1)x-2(4) \\ 2(5x^2+1x-4)\] now let's look at factoring the thingy in ( ) That is let's look at factoring: \[5x^2+1x-4 \text{ aka } 5x^2+x-4\]

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freckles
  • freckles
notice a=5 b=1 c=-4 you are looking for two factors of ac that have product ac and sum b
freckles
  • freckles
that is what two integer numbers when you multiply them give you -20 and when you add them give you 1
OregonDuck
  • OregonDuck
2*(x+1)*(5x-4)
OregonDuck
  • OregonDuck
so b
freckles
  • freckles
Remember to not give direct answers in the future. Thank you kindly.
OregonDuck
  • OregonDuck
ok sorry

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