awesomebutterfly awesomebutterfly

27-01-2020
Mathematics

contestada

I need Help please! Evaluate the "expression" for a= -1, b= 9 and c= -2. b^2–4ac.

Respuesta :

someone666888 someone666888

27-01-2020

Answer:

-170

Step-by-step explanation:

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

-2(81)-4(2)

-162-8

-170

Answer Link

beritogwu beritogwu

27-01-2020

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

Answer Link

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