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Factor 2x^2 – 3x – 5.

Sagot :

Mlcparra16viz
We do the quadratic formula:
x = 3 ± √(3²+40) = 3 ± √(49) = 3 ± 7  = 5/2 or  -1
              4                 4            4 

So we have (x-5/2)(x+1)
Then since we have a equal to 2 then we multiply this by 2 getting:

2x²-3x-5 = (2x-5)(x+1)