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Factor by grouping: 5c^2-39c-8
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eNoter, TA, Mathematician, Super Tutor, Tutor
Multiply `a xx c` `a=5` `b=-39` `c=-8`
`5xx-8 = -40 ` then find factors of -40 that minus to -39
these numbers will be -40 and 1, plug them into the problem
`5c^2-40c+1c-8` now group the numbers and find the highest number they have in common
Posted by atyourservice on February 23, 2014 at 1:35 AM (Answer #2)
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