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3 years ago

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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See the explanation

<h2>Explanation:</h2>

Remember you have to provide complete questions in order to get exact answers. Here I'll provide a general explanation, so:

<h3>First.</h3>

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By using graphing tool, we get the first graph shown below.

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By using graphing tool, we get the third graph shown below.

<h3>Fourth.</h3>

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<h2>Learn more:</h2>

Linear inequalities: brainly.com/question/12984296

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