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Josue Mccormick
Mathematics
2 March, 02:15
Completely factor 6a^2 - 8a - 30
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Francesca Shea
2 March, 02:44
0
Factor out 2
2 (3a^2-4a-15)
hmm
trial and error
nope
fancy I-forgot-the-name way
multiply 3 and - 15 to get - 45
find y and t such that yt=-45 and y+t=-4
tricky
hmm
-9 and 5
split - 4a into - 9a and 5a
2 (3a^2-9a+5a-15)
split and factor
2[ (3a^2-9a) + (5a-15) ]
factor oout common factors
2[3a (a-3) + 5 (a-3) ]
epic reverse distribute, remmber ab+ac=a (b+c) the (a-3) is theh a part
2[ (a-3) (3a+5) ]
something
(2) (a-3) (3a+5)
(2) (3a+5) (a-3) is factored form
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