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2 years ago

Find the exact solution of -x2 +7x + 5 = 0 by using the Quadratic Formula.

Mathematics

1 answer:

jonny [76]2 years ago

7 0

Answer:

The answer to your question is:

x 1 = -0.65

x2 = 7.65

Step-by-step explanation:

Equation -x² + 7x + 5 = 0

a = -1

b = 7

c = 5

Quadratic formula x = -b ±√(b² -4ac) / 2a

x = - 7 ± √(7² -4(-1)(5) / 2(-1)

x = -7 ± √(49 + 20) / -2

x = -7 ± √69 / -2

x = - 7 ± 8.3 / -2

x1 = -7 + 8.3 / -2 x2 = -7 -8.3 / -2

x 1 = -0.65 x2 = 7.65

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3 years ago

Read 2 more answers

Find the measure of the angles indicated

GalinKa [24]

Both angles have a measure of 125°.

<h3>How to find the measure of the angles?</h3>

Assuming the two horizontal lines are parallel, we know that the measure of the two indicated angles must be the same one.

Then:

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Now we need to solve this for x:

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Now that we know the value of x we can replace it in any of the expressions for the angles:

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Both angles have a measure of 125°.

If you want to learn more about angles:

brainly.com/question/25716982

#SPJ1

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