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shepuryov [24]
3 years ago
7

When factored completely, what are the factors of 4x^2-16 ?

Mathematics
2 answers:
Semmy [17]3 years ago
8 0
Use:a^2-b^2=(a-b)(a+b)\\\\4x^2-16=4(x^2-4)=4(x^2-2^2)=\boxed{4(x-2)(x+2)}
Klio2033 [76]3 years ago
8 0
4x^2-16=\\
4(x^2-4)=\\
4(x-2)(x+2)
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What is a variable? HELP HELP
bonufazy [111]

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➷ A variable is an unknown number that is represented by a letter, for example, x.

It is usually found in an algebraic expression.

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5 0
3 years ago
What is the value of f(-1) when f(x)=2x+2? F(-1)=?
igomit [66]

Here is your function:

f(x)=2x+2

You're looking for f(-1). To get your answer, you have to replace all the x's with -1.

Here is your new equation:

f(-1) = 2(-1)+2

Multiply 2 by -1

2 \times -1 = -2

<em>Remember:</em>

MULTIPLYING

  • Positive(+) times negative(-) is equal to negative
  • Positive(+) times positive(+) is equal to positive
  • Negative(-) times negative(-) is equal to positive
  • Negative(-) times positive(+) is equal to negative

DIVIDING

  • Positive(+) divided by positive(+) is equal to positive
  • Positive(+) divided by negative(-) is equal to negative
  • Negative(-) divided by positive(+) is equal to negative
  • Negative(-) divided by negative(-0 is equal to positive

Since you're multiplying a negative number by a positive number, the answer will be negative.

Here is your new equation:

f(-1) = -2+2

Add -2 and 2:

-2+2 = 0

That means your answer is 0

        ↓

f(-1)=0

<em>If you have any questions, feel free to ask in the comments! :)</em>

5 0
3 years ago
Symiah went to the bookstore and bought a hardcover book which was marked 10 percent off. If she saved $5 on the book, what was
Crank

Is it obvious the 10% of the book's price is the $5 right?

So the book's price is $50.

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3 years ago
Log1/2 28? What is it?
I am Lyosha [343]
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\log_ab=\frac{\log_cb}{\log_ca}\\-------------------------\\\log_\frac{1}{2}7=\frac{\log\frac{1}{2}}{\log7}\approx\frac{-0.6931}{1.9459}\approx-0.3562\\\\therefore\\\\\boxed{\log_\frac{1}{2}28\approx2+(-0.3562)=1.6438}
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3 years ago
Rewrite in simplest radical form: 1x/-3 over x^6 Show each step of your process please
nexus9112 [7]
X/-3 / x^6 = x/-3 * 1/x^6 = x/ -3x^6= 1/ -3x^5
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3 years ago
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