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pychu [463]
3 years ago
11

What are the solutions of the equation x4 – 9x2 + 8 = 0? Use u substitution to solve.

Mathematics
2 answers:
rosijanka [135]3 years ago
6 0

Answer:

Option (2)

Step-by-step explanation:

Given equation is,

x⁴- 9x² + 8 = 0

Let x² = t

By substituting the value of x²= t in the equation,

t² - 9t + 8 = 0

t² - 8t - t + 8 = 0

t(t - 8) - 1(t - 8) = 0

(t - 1)(t - 8) = 0

(t - 1) = 0 ⇒ t = 1

(t - 8) = 0 ⇒ t = 8

Since, t = x²

x² = 1 ⇒ x = ±1

x² = 8 ⇒ x = ±2√2

Therefore, Option (2) will be the correct option.

love history [14]3 years ago
3 0

Answer:

B

Step-by-step explanation:

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3 years ago
Jason wants to walk the shortest distance to get from the parking lot to the beach. a.How far is the spot on the beach from the
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3 RIGHT TRIANGLES

1 big right triangle is divided into 2 smaller ones. Medium and small.

<span> a.How far is the spot on the beach from the parking lot? </span>

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Small triangle: long leg = x ; short leg = 18m

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Parking lot to the beach is 24 meters.

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Use Pythagorean theorem:

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