Respuesta :

Answer:

-170

Step-by-step explanation:

- 2(9)^2-4(-1)(-2)

-2(81)-4(2)

-162-8

-170

Answer

b²-4ac. When a= -1 b= 9 c= -2

Substitute the values a,b and c in the equation

=9²-4(-1)(-2)

=81-4(2) note that -1*-2= 2

=81-8

=73

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