3 years ago

Factor completely 4x^2-1

Mathematics

1 answer:

allochka39001 [22]3 years ago

4 0

<span>4x^2-1 = (2x +1)(2x - 1)

using a^2 - b^2 = (a+b)(a-b)

hope that helps</span>

You might be interested in

Which of the following statements must be true about the polynomial function f(x)? If 1+ the sqrt of 13 is a root of f(x), then

son4ous [18]

The correct answer is: if $1 + 13i$ is a root of $f(x)$ , then $1 - 13i$ is also a root of $f(x)$ .

In fact, every polynomial has real and/or complex solutions. If all solutions are real, we're good. But if not all of them are real, then the complex ones come in couple of conjugate solutions. Since $1 + 13i$ and $1 - 13i$ are conjugate complex numbers, if one of them is a solution, the other must be as well.

7 0

3 years ago

Read 2 more answers

A foot ball field measures 100m by 72m. A school marks a football field similar in shape to a fullsize football field but only 3

Anna35 [415]

Answer: 21.6 m

Step-by-step explanation:

Given

A football field measures $100\ m\times 72\ m$

If a football field similar in shape to a full size has a length $l=30\ m$

The ratio of the length of the original to the small field is the same

Assume the width of the small field is w

$\therefore \dfrac{100}{30}=\dfrac{72}{w}\\\\\Rightarrow w=30\times \dfrac{72}{100}\\\\\Rightarrow w=21.6\ m$

Thus, the width of the field is 21.6 m

6 0

2 years ago

3n + 8 = 53<br> I don’t understand how to find the n

olganol [36]

Answer:

n=15

Step-by-step explanation:

subtract 8 from both sides to get 3n=45

divide both sides by 3 to solve for n to get n=15

3 0

3 years ago

Read 2 more answers

How many ways can this be done?

RSB [31]

This can be solved 6 ways depending on how many numbers u have

5 0

3 years ago

Read 2 more answers

Given that angle 3 is a supplement of angle 4 and that angle 3 equals 117 degrees. find angle 4

My name is Ann [436]

Supplementary angles are two angles that add up to 180 degrees. so....<3 + <4 = 180 <3 is 117 so sub in 117 for <3 117 + <4 = 180 <4 = 180 - 117 <4 = 63 degrees

7 0

3 years ago