anonymous
  • anonymous
Factor by grouping 4c^2+9c-28 There is not a common denominator so I think this should look like (2c+3-4)^2 But the answer is wrong. Any takers
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
Factor by trinomial method. So multiple 4 and -28 together to get -112. Factors of -112 that add up to 9 are 16 and -7. So split the middle term with those numbers, so it's: 4c^2+16c-7c-28, then factor by grouping. So 4c(c+4)-7(c+4), so it factors into (4c-7)(c+4)
amistre64
  • amistre64
get all the factors of 4(-28). and see which ones combine to get +9. Like spaceknight did :)

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