Respuesta :

Answer:

Step-by-step explanation:

19.

2x^2+x-6=0

x^2+x-12=0

(x+2)(2x-3)=0

x=-2,3/2

20.

x^2+8x+15=0

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

x=-3,-5

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Answer:

19--

(2x-3) (x+2)=0

20--

x = 3,-5

Step-by-step explanation:

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