olgarpt olgarpt
  • 24-09-2017
  • Mathematics
contestada

6x^2 + 17x + 5= 0 factor this equation

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Аноним Аноним
  • 24-09-2017
Use the ac method
ac = 6 * 5 = 30
Now we need some factors of 30 that give  us +17  when we add them:-
15 and  2 look good So we can write 

6x^2 + 15x + 2x + 5  = 0

swap middle terms:-

6x^2 + 2x + 15x + 5 = =

2x(3x + 1) + 5(3x + 1)        3x + 1 is common so :-


(2x + 5)(3x + 1) = 0


x = -5/2 , -1/3

Answer Link
Jaymes1
Jaymes1 Jaymes1
  • 24-09-2017
6×5=30
Common factor is +2 and +15
6x exponent 2 +2x+15x+5
2x(3x+1)+5(3x+1)
(2x+5)+(3x+1)
Therefore the factors are
-5\2 and -1\3
Answer Link

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