anyone43
anyone43
24-04-2017
Mathematics
contestada
solve by factoring 3x^2 -19x -40 = 0
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Qveendesi1
Qveendesi1
24-04-2017
(3x^2 - 19x) - 40=0
Multiply 3*-40=-120
Then find the factor which is -19
Now using 2 factors ~
3x2 - 24x
+
5x - 40
We going to split it up
3x*(x-8)
Add your last two terms
5*(x-8)
Then add up the 4 terms
(3x+5)*(x-8)
Which means x=8
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