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OpenStudy (anonymous):
WILL MEDAL!! What are the factored forms of the following expressions? 3. 12d^2+4d-1 a. (6d+1)(2d+1) b. (6d-1)(2d-1) c. (6d-1)(2d+1) d. (6d+1)(2d-1)
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OpenStudy (campbell_st):
well the last term is -1 so the 2 factors need to have 1 positive and 1 negative to achieve that result... then to get 4d as the middle term you need the larger factor of 12d^2 to be multiplied by 1
OpenStudy (anonymous):
C? @campbell_st
OpenStudy (campbell_st):
looks good to me
OpenStudy (anonymous):
Was the last one you helped with c as well? @campbell_st
OpenStudy (campbell_st):
well you can expand it with FOIL to check
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