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allochka39001 [22]
3 years ago
8

PLSSS HELPPPP!!! Find all real zeros and complexof each equation f(x)=(x^2+4)(x^2-9)

Mathematics
1 answer:
Mila [183]3 years ago
4 0

Answer:

x = ± 3, x = ± 2i

Step-by-step explanation:

Given

f(x) = (x² + 4)(x² - 9)

To find the zeros let f(x) = 0, that is

(x² + 4)(x² - 9) = 0

Equate each factor to zero and solve for x

x² - 9 = 0 ( add 9 to both sides )

x² = 9 ( take the square root of both sides )

x = ± \sqrt{9} = ± 3

x² + 4 = 0 ( subtract 4 from both sides )

x² = - 4 ( take the square root of both sides )

x = ± \sqrt{-4} = ± \sqrt{4(-1)} = ± \sqrt{4} ×\sqrt{-1} = ± 2i

Thus zeros are

x = - 3, x = 3 ← real

x = - 2i, x = 2i ← complex

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Answer:

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Step-by-step explanation:

We can find the slope of a line by using two points

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The slope is given by

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Answer:

x intercept at (7/3 , 0)

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Step-by-step explanation:

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we need to find x  and y intercepts

To find x intercept , plug in 0 for y

9x - 7(0) = 21

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divide by 9 on both sides

x= 21/ 9 = 7/3

so x intercept at (7/3 , 0)

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6 0
3 years ago
Paulo can run a marathon in four hours and 20 minutes. If he's able to cut of 18% of his time, how long will it take him to run
Inga [223]
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7 0
3 years ago
Solve this and help me plsss​
alexandr402 [8]

Answer:

x = 2

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x² (log 27 / log 9) = x + 4

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3x² − 2x − 8 = 0

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x = 2 or -4/3

Since x > 0, x = 2.

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3 years ago
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Gemiola [76]

Answer:

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Step-by-step explanation:

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