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2 years ago

Which of the following are solutions to the equation below? Check all that apply. x2 + x - 20 = 0

Mathematics

2 answers:

Mila [183]2 years ago

7 0

Δ = 1 + 4*20 = 81
x' = (-1 + 9)/2 = 4
x'' = (-1 - 9)/2 = -5
4² + 4 - 20 = 0
(-5)² - 5 - 20 = 0
Ok !

erastova [34]2 years ago

6 0

Answer:-5 and 4

Step-by-step explanation:

apex

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Which of the following are factors of x^4 – 16? Select all that apply.

nekit [7.7K]

<h2>Answer:</h2><h2>x^2+4 and X+2</h2>

Solution,

x^4-16

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=(x^2+4)(x^2-2^2)

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2 years ago

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kherson [118]

Answer:

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Step-by-step explanation:

3-(x-3)=25

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2 years ago

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Arisa [49]

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2 years ago

4 times what equals 3/4

AURORKA [14]

Answer:

Is there supposed to be a fraction on the 4??

Step-by-step explanation:

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Simplity (4^-2)^5 A.1/4^10 B. 4^3 C.1/4^3 D. 4^10

Goshia [24]

Answer:

$(4^{-2})^5=\dfrac{1}{4^{10}}$

Step-by-step explanation:

The given expression is : $(4^{-2})^5$

We need to simplify the above expression.

We know that, $x^{-a}=\dfrac{1}{x^a}$

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So, the simplified form of the given expression is $\dfrac{1}{4^{10}}$ . Hence, the correct option is (A).

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