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fgiga [73]
3 years ago
7

How to solve 2x²-8x-90=0

Mathematics
1 answer:
8090 [49]3 years ago
4 0
А=2
b=-8
c=-90
D=b^2-4ac
D=64+720
D=784=28^2
X1,2=(-b-+D):2a
Х1,2=(8+-28):4
Х1=-5
Х2=9
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Answer:

71%

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P(A and B): 0.5

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4 0
3 years ago
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The black figure is an ellipse, and the black line segment is is major axis. What is the length of the blue line segment?
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D

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The formula we need to solve this is:

d_1+d_2=2a

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d_2  is the second distance from another focus to same vertex

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slega [8]

Answer:

Step-by-step explanation:

Answer:

odd function

Explanation:

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