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3 years ago

If {X)= x-9 and d(x) = x + 3, what is the domain of (cd)(x)?

Mathematics

1 answer:

Aleonysh [2.5K]3 years ago

5 0

Answer:

i wish i knew

Step-by-step explanation:

i wanted to type

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timofeeve [1]

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2 years ago

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Step-by-step explanation: So first

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2 years ago

What are the exact solutions of x2 − 5x − 7 = 0, where x equals negative b plus or minus the square root of b squared minus 4 ti

Marat540 [252]

Answer:

$x = \frac{5 + \sqrt{53}}{2}$ or $x = \frac{5 - \sqrt{53}}{2}$

Step-by-step explanation:

Given

$x^2 - 5x - 7 = 0$

Required

Solve for x using:

$x = \frac{-b \± \sqrt{b^2 - 4ac}}{2a}$

First, we need to identify a, b and c

The general form of a quadratic equation is:

$ax^2 + bx + c = 0$

So, by comparison with $x^2 - 5x - 7 = 0$

$a = 1$ $b = -5$ $c = -7$

Substitute these values of a, b and c in

$x = \frac{-b \± \sqrt{b^2 - 4ac}}{2a}$

$x = \frac{-(-5) \± \sqrt{(-5)^2 - 4 * 1 * -7}}{2 * 1}$

$x = \frac{5 \± \sqrt{25 +28}}{2}$

$x = \frac{5 \± \sqrt{53}}{2}$

Split the expression to two

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To solve further in decimal form, we have

$x = \frac{5 + 7.28}{2}$ or $x = \frac{5 - 7.28}{2}$

$x = \frac{12.28}{2}$ or $x = \frac{-2.28}{2}$

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3 years ago

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Klio2033 [76]

Hello :
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3 years ago

Brayden has a triangular flag hanging in his room. What is the area of the flag? *

elena-s [515]

Answer:

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2 years ago

If {X)= x-9 and d(x) = x + 3, what is the domain of (cd)(x)?​

If {X)= x-9 and d(x) = x + 3, what is the domain of (cd)(x)?